Cyber Security Jobs at Newly Funded UK Start-ups: Q3 2025 Investment Tracker

1. The UK’s Cyber Security Landscape: Resilient and Rapidly Growing

The UK has always been at the forefront of cyber security research and practice—thanks to a combination of factors:

1. Robust Regulatory Environment: Over the last decade, regulations such as the General Data Protection Regulation (GDPR) and the Network and Information Systems (NIS) Directive have elevated the importance of cyber security. Organisations face hefty fines for data breaches, driving demand for robust security solutions.

2. Academic Centres of Excellence: The UK is home to top universities, such as the University of Oxford, Imperial College London, and University College London, many of which boast specialised cyber research centres. This continuous research pipeline feeds into commercial spin-outs and start-ups.

3. Government Support: Initiatives like the UK Cyber Security Strategy and public-private partnerships ensure an environment that encourages cyber security innovation. GCHQ’s Accelerator Program has also fostered numerous successful start-ups over recent years.

4. Growing Threat Landscape: Cyberattacks grow in complexity each year. Whether it’s ransomware crippling healthcare systems or data theft targeting e-commerce, businesses and governments know they need advanced solutions. This constant threat underpins the business case for cyber security start-ups.

By Q3 2025, it’s clear that cyber security is a critical industry in the UK, with roles spanning everything from cloud security to forensic incident response. Let’s see how newly funded start-ups in this dynamic sector are shaping the next wave of defensive technologies.

2. Why Q3 2025’s Funding Matters for Cyber Security Job Seekers

If you’re in the market for a cyber security job, tracking funding news can significantly sharpen your search:

1. Immediate Vacancies
   Newly funded start-ups often have urgent hiring needs: fresh capital means they can scale R&D, ramp up product deployment, and onboard a variety of security professionals—from threat hunters to compliance experts.

2. Competitive Compensation
   Venture capital investment typically comes with the resources to offer robust compensation packages, including equity stakes or performance bonuses. If you time your application when a start-up announces its funding, you might gain an edge in negotiating salary and benefits.

3. Diverse Roles
   As start-ups expand, they need multiple skill sets: software engineers with a security focus, product managers knowledgeable in risk assessment, marketing specialists who can convey complex solutions, and more.

4. Accelerated Career Paths
   A newly funded start-up can be an ideal environment to fast-track your career, giving you visibility into strategic projects and offering leadership opportunities as teams grow.

5. Impact-Driven Missions
   Cyber security is inherently about protecting people and organisations from potentially devastating breaches. Joining a start-up that’s developing an innovative product means actively helping shape the future of digital defence.

By focusing on newly funded start-ups, you can identify high-growth environments that are actively seeking talent—and you might just find a position that perfectly aligns with your goals and expertise.

3. Q3 2025 Cyber Security Funding in the UK: A High-Level Overview

Despite economic fluctuations in other tech sub-sectors, cyber security investment remains strong. In Q3 2025, we saw multiple start-ups announcing successful funding rounds—some in early (Seed/Series A) stages, while others reached more mature rounds (Series B/C) to drive global expansion.

Below, we spotlight five newly funded UK cyber security start-ups. You’ll learn about their focus areas, how they plan to use the influx of capital, and the specific roles they’re currently recruiting for.

4. OmniShield AI – Advanced Threat Detection and Response

• Funding Round: Series B

• Amount Raised: £20 million

• Headquarters: London

• Focus: AI-driven threat detection and automated incident response

Company Snapshot

OmniShield AI has rapidly gained traction by integrating machine learning (ML) and artificial intelligence (AI) into a next-gen Security Information and Event Management (SIEM) platform. The system ingests massive volumes of logs, network traffic, and endpoint data, using predictive models to identify anomalous patterns that signal potential intrusions. Unlike traditional SIEM solutions, OmniShield AI uses reinforcement learning to dynamically adapt to new attack vectors, automating the initial incident response steps.

Use of Funds

Following a significant £20 million Series B injection, OmniShield AI plans to:

1. Accelerate R&D: Expand their AI research team to refine threat-hunting algorithms, reduce false positives, and incorporate more robust behavioural analysis.

2. Scale Global Sales: Pursue new enterprise clients, especially in finance and healthcare, where real-time detection is paramount.

3. Grow Engineering & Operations: Hire specialists to manage large-scale data pipelines and to develop advanced modules for the platform.

Key Cyber Security Roles at OmniShield AI

1. Security Data Scientist

   • Responsibilities: Build ML models for anomaly detection, refine data analysis pipelines, conduct A/B tests for detection accuracy.

   • Skills Needed: Python/R, deep learning frameworks (TensorFlow, PyTorch), big data processing (Spark/Hadoop), knowledge of security data sets (logs, NetFlow, PCAP).

2. SOC Analyst (Level 2/3)

   • Responsibilities: Investigate alerts generated by the OmniShield platform, coordinate incident response, provide input on detection rule tuning.

   • Skills Needed: Strong knowledge of TTPs (Tactics, Techniques, Procedures), familiarity with threat intelligence tools, experience with SIEM dashboards.

3. DevSecOps Engineer

   • Responsibilities: Integrate security checks into the CI/CD pipeline, ensure cloud deployments are hardened, automate vulnerability scanning.

   • Skills Needed: Container orchestration (Kubernetes), infrastructure-as-code (Terraform), best practices for secure software development.

4. Customer Success Manager (Cyber)

   • Responsibilities: Train clients on platform usage, gather feedback to guide future feature development, ensure high satisfaction and retention rates.

   • Skills Needed: Excellent communication, working knowledge of cyber security frameworks, account management experience.

OmniShield AI epitomises how artificial intelligence can elevate proactive threat detection. For those passionate about predictive analytics and sophisticated defences, this start-up offers challenging and mission-critical roles.

5. CyberLockr – Quantum-Resistant Encryption

• Funding Round: Seed

• Amount Raised: £4 million

• Headquarters: Cambridge

• Focus: Post-quantum cryptographic solutions for data security

Company Snapshot

CyberLockr entered the spotlight in 2024 to tackle a looming concern: the arrival of quantum computing. As quantum machines progress, the cryptographic systems that secure today’s data could become vulnerable. CyberLockr develops post-quantum encryption algorithms and secure key exchange protocols designed to withstand brute-force attempts by quantum computers. Already collaborating with the University of Cambridge’s quantum computing lab, the company is a pioneer in forging cryptographic standards for the future.

Use of Funds

With an initial £4 million seed round, CyberLockr aims to:

1. Productise Research: Transition theoretical cryptographic models into ready-to-use libraries and enterprise solutions.

2. Pilot Deployments: Partner with government agencies and high-tech manufacturers to run pilot encryption solutions, validating real-world performance.

3. Expand Team: Recruit cryptographers, security protocol experts, and software engineers to refine key management systems and secure integration frameworks.

Key Cyber Security Roles at CyberLockr

1. Cryptography Engineer

   • Responsibilities: Research and implement post-quantum algorithms (e.g., lattice-based, code-based cryptography), optimise performance on various hardware architectures.

   • Skills Needed: Mathematics background (number theory, linear algebra), knowledge of NIST PQC competition, C/C++ or Rust for algorithm prototyping.

2. Security Protocol Developer

   • Responsibilities: Design and build secure communication protocols, ensuring backward compatibility with legacy systems, integrate hardware security modules (HSMs).

   • Skills Needed: TLS, PKI infrastructures, cryptographic APIs (OpenSSL), secure coding practices.

3. Research Scientist (Quantum Security)

   • Responsibilities: Continuously assess quantum computing breakthroughs, evaluate the vulnerability of existing algorithms, propose new cryptographic schemes.

   • Skills Needed: Peer-reviewed research experience, strong analytical skills, familiarity with quantum computing fundamentals (qubits, quantum gates).

4. Product Manager (Encryption Solutions)

   • Responsibilities: Oversee product lifecycles, gather customer requirements for quantum-safe solutions, define go-to-market strategies.

   • Skills Needed: Understanding of cryptographic standards, experience with enterprise security, excellent stakeholder communication.

As the next generation of encryption becomes a pressing concern, CyberLockr stands at the cutting edge—an ideal choice if you’re intrigued by quantum computing’s security implications and want to future-proof global data.

6. BitSentinel – Blockchain Security and Smart Contract Auditing

• Funding Round: Series A

• Amount Raised: £8 million

• Headquarters: Manchester

• Focus: Blockchain threat intelligence and smart contract security

Company Snapshot

With decentralised finance (DeFi) and Web3 applications in the spotlight, BitSentinel focuses on protecting blockchain ecosystems from exploits. Their platform offers real-time threat intelligence on blockchain transactions, suspicious wallet activities, and potential rug pulls. They also specialise in auditing smart contracts, verifying code integrity, and ensuring tokens or DeFi protocols remain secure against hacking attempts.

Use of Funds

An £8 million Series A funding round will enable BitSentinel to:

1. Refine Blockchain Monitoring: Enhance real-time dashboards that flag malicious transactions or unusual DeFi movements, covering multiple chains (Ethereum, Polygon, Solana, etc.).

2. Scale Audit Services: Launch a dedicated unit for auditing large-scale DeFi projects, NFT marketplaces, and enterprise-level blockchain solutions.

3. Recruit Specialists: Hire penetration testers with blockchain expertise, threat hunters focusing on crypto transactions, and compliance professionals for emerging regulations.

Key Cyber Security Roles at BitSentinel

1. Smart Contract Security Auditor

   • Responsibilities: Conduct line-by-line reviews of Solidity or Rust-based contracts, identify logical flaws or vulnerabilities, generate detailed audit reports.

   • Skills Needed: Deep knowledge of blockchain fundamentals, testing frameworks (Hardhat, Foundry), attack vectors in DeFi (re-entrancy, flash loan exploits).

2. Threat Intelligence Analyst (Blockchain)

   • Responsibilities: Monitor on-chain transactions, track hacking groups targeting DeFi, create intelligence briefs for clients, recommend mitigations.

   • Skills Needed: Understanding of blockchain explorers, data analysis (Python, SQL), knowledge of cybercriminal TTPs in crypto.

3. Penetration Tester (Web3)

   • Responsibilities: Simulate attacks on decentralised applications (dApps), find vulnerabilities in bridging protocols, evaluate new token launches.

   • Skills Needed: Common pen testing tools (Burp Suite, Metasploit), plus specific blockchain frameworks, ability to perform social engineering on crypto communities.

4. Technical Writer (Security & Web3)

   • Responsibilities: Produce accessible documentation for audits, maintain knowledge bases on common exploits, create white papers or best practice guides.

   • Skills Needed: Excellent writing, deep understanding of blockchain security, ability to simplify technical jargon.

BitSentinel is perfect if you’re passionate about the intersection of blockchain innovation and cyber security. As crypto and DeFi evolve, so do the threats—and BitSentinel is on the frontlines of defence.

7. TrustSeal – Identity and Access Management in the Cloud

• Funding Round: Series B

• Amount Raised: £14 million

• Headquarters: Edinburgh

• Focus: Cloud identity and access management (IAM) solutions

Company Snapshot

TrustSeal addresses a crucial gap in modern IT infrastructures: secure and seamless identity management across multiple cloud environments. Its platform centralises identity provisioning, single sign-on (SSO), multi-factor authentication (MFA), and role-based access controls. By automating user lifecycle management, TrustSeal helps organisations protect data while enhancing employee productivity—especially relevant for hybrid workplaces.

Use of Funds

With £14 million in Series B, TrustSeal aims to:

1. Expand Cloud Integrations: Offer plug-and-play IAM solutions for AWS, Azure, GCP, and popular SaaS platforms (Salesforce, Office 365, etc.).

2. Develop Zero-Trust Modules: Integrate advanced user analytics and continuous verification for high-risk industries like finance, healthcare, and government.

3. Hire Security & Compliance Experts: Grow their team to handle country-specific regulations, privacy requirements, and large-scale IAM deployments.

Key Cyber Security Roles at TrustSeal

1. IAM Engineer

   • Responsibilities: Configure and maintain identity management solutions, design access policies, ensure seamless SSO and MFA workflows.

   • Skills Needed: SAML/OAuth/OIDC protocols, directory services (LDAP, Active Directory), knowledge of cloud services and zero-trust frameworks.

2. Solutions Architect (Cyber Security)

   • Responsibilities: Design end-to-end IAM architecture for enterprise clients, advise on best practices for identity governance, map business requirements to technical specifications.

   • Skills Needed: Cloud architecture (AWS/Azure/GCP), DevOps background, strong knowledge of role-based (RBAC) and attribute-based (ABAC) access control models.

3. Compliance Manager (IAM)

   • Responsibilities: Ensure TrustSeal’s solutions meet relevant regulations (GDPR, ISO 27001, SOC 2), conduct internal audits, manage certifications.

   • Skills Needed: Compliance frameworks, risk management, documentation and policy writing, stakeholder management.

4. Product Marketing Manager (Security)

   • Responsibilities: Develop go-to-market strategies, create targeted content and demos, highlight the platform’s benefits in campaigns.

   • Skills Needed: Understanding of IAM and cyber threats, marketing analytics, competitive positioning in cyber security markets.

For those who enjoy the operational side of security and the interplay between user access and data protection, TrustSeal’s mission is core to modern zero-trust architectures, offering numerous roles in a rapidly expanding arena.

8. SentinelGreen – Sustainable Cyber Solutions

• Funding Round: Seed

• Amount Raised: £3 million

• Headquarters: Bristol

• Focus: Eco-friendly cyber security tools and services

Company Snapshot

SentinelGreen is a newcomer in the cyber security space, yet it’s already drawing attention for its unique angle: environmentally sustainable security solutions. They optimise threat detection platforms to minimise CPU usage and carbon emissions, partner with “green” data centres powered by renewable energy, and offer consulting on reducing the environmental impact of large-scale security operations.

Use of Funds

After raising £3 million in seed funding, SentinelGreen plans to:

1. Advance Eco-Focused R&D: Develop more energy-efficient intrusion detection systems (IDS), implement serverless infrastructure, and reduce computational overhead in security tasks.

2. Establish Partnerships: Collaborate with climate-conscious enterprises, data centre providers, and renewable energy suppliers to embed sustainability in security frameworks.

3. Hire a Multidisciplinary Team: Bring on professionals who understand both cyber security and environmental best practices, bridging the gap between two critical domains.

Key Cyber Security Roles at SentinelGreen

1. Green Security Architect

   • Responsibilities: Design security solutions with minimal carbon footprints, evaluate data centre sustainability, optimise usage of computing resources.

   • Skills Needed: Standard cyber security architecture knowledge plus an understanding of renewable energy strategies, carbon footprint metrics, and resource efficiency.

2. Energy-Efficient Software Engineer (Cyber)

   • Responsibilities: Write code that minimises CPU/GPU usage, reduce memory footprints, optimise real-time threat detection processes.

   • Skills Needed: C/C++ or Go for performance-critical systems, concurrency management, testing for power consumption.

3. Sustainability Analyst (Security Ops)

   • Responsibilities: Create metrics for measuring environmental impact in SOC operations, produce sustainability reports, advise on carbon offset programmes.

   • Skills Needed: Data analysis, knowledge of carbon accounting standards, basic security operations background.

4. Cyber Consultant (Green Compliance)

   • Responsibilities: Advise clients on aligning security frameworks with sustainability targets, manage compliance with environmental regulations, run eco-audits.

   • Skills Needed: Consultancy background, high-level cyber security expertise, knowledge of environment-focused certifications (ISO 14001, etc.).

SentinelGreen’s eco-focused approach stands out in a world increasingly concerned about energy consumption. If you’re passionate about environmentalism and digital security, this start-up offers a chance to combine both pursuits in a fresh, emerging niche.

9. High Demand for Cyber Security Professionals: Roles and Specialisations

From the start-ups profiled above, it’s clear that demand for cyber security talent has never been greater. The range of available positions is vast, appealing to a wide spectrum of interests and expertise levels:

1. Security Engineers & Analysts: Building, monitoring, and maintaining security infrastructures—whether on-prem, in the cloud, or hybrid environments.

2. Penetration Testers & Red Team Members: Probing systems for weaknesses, simulating real-world attacks to help organisations fortify defences.

3. Incident Responders & Forensic Experts: Investigating breaches, securing compromised systems, and preserving digital evidence.

4. DevSecOps & Automation: Integrating security from code commit to deployment, ensuring vulnerabilities are caught early.

5. AI-Driven Threat Hunters: Employing machine learning to identify advanced persistent threats (APTs) that elude conventional detection.

6. Governance, Risk, Compliance (GRC): Interpreting regulations, policy development, and risk assessments—vital for ensuring cyber security meets legal mandates.

7. Cryptography & Secure Communications: Designing and implementing encryption protocols, especially relevant with the looming quantum threat.

8. Cloud Security Specialists: Focusing on AWS, Azure, GCP, or multi-cloud infrastructures where misconfigurations can lead to large-scale breaches.

With start-ups constantly innovating in these areas, skilled professionals are spoilt for choice. Now let’s look at how you can boost your chances of landing a role at these newly funded ventures.

10. In-Demand Skills and Qualifications in Cyber Security

Succeeding in a rapidly evolving field like cyber security requires a blend of technical prowess, continuous learning, and soft skills. Here’s what recruiters typically look for:

1. Technical Expertise

   • Security Fundamentals: Strong grasp of network security, cryptography, operating system internals, and common attack vectors (SQL injection, XSS, etc.).

   • Tools & Frameworks: Familiarity with industry-standard tools like SIEM (Splunk, QRadar), EDR solutions (CrowdStrike, SentinelOne), and pen-testing suites (Kali Linux, Metasploit).

   • Cloud Platforms: AWS, Azure, or GCP, plus an understanding of how to harden resources (IAM best practices, security groups, encryption at rest/in transit).

   • Coding/Scripting: Python is especially common in security automation, data parsing, and building custom detection rules.

2. Certifications

   • Vendor-Neutral: CompTIA Security+, Certified Ethical Hacker (CEH), Certified Information Systems Security Professional (CISSP), and GIAC credentials can bolster your CV.

   • Vendor-Specific: For cloud-focused roles, AWS Certified Security – Specialty, Azure Security Engineer Associate, or Google Professional Cloud Security Engineer can be big pluses.

3. Analytical Mindset

   • Threat Modelling: The ability to anticipate an attacker’s methods, identify potential vulnerabilities, and prioritise remediation efforts.

   • Incident Handling: Understanding how to triage, contain, eradicate threats, and conduct post-incident reviews.

4. Communication & Teamwork

   • Collaborative Skills: Cyber security is rarely a solo endeavour. You’ll coordinate with developers, ops teams, and management.

   • Reporting & Documentation: Clear, concise writing and presentation skills are essential for explaining complex issues to non-technical stakeholders.

5. Continuous Learning

   • Industry News: Stay updated on zero-day exploits, new hacking tools, patch releases. The threat landscape evolves daily.

   • Hands-On Projects: Participating in capture-the-flag (CTF) events, hackathons, or open-source security projects can differentiate you from other applicants.

11. Tips for Landing a Role at a Newly Funded Cyber Security Start-up

With multiple options available, here’s how you can stand out and secure a position that’s both rewarding and career-defining:

1. Tailor Your CV and Cover Letter

   • Highlight relevant experiences, emphasising tangible achievements (e.g., “Reduced average incident response time by 40%,” “Identified a critical vulnerability in web application used by 10,000 users.”).

   • Reference specific projects that match the start-up’s tech stack or domain focus.

2. Showcase Your Portfolio

   • Maintain a GitHub (if you code) or a personal blog that details cyber security problems you’ve tackled, research you’ve conducted, or vulnerability disclosures you’ve made.

   • For pen testers and red teamers, highlight captured flags from well-known CTF platforms, if permissible.

3. Network Wisely

   • Attend cyber security conferences (e.g., BSides, Black Hat Europe, Infosecurity Europe) and local meetups. Networking often leads to insider knowledge of job openings.

   • Engage with online communities on Twitter, LinkedIn, or specialised forums like /r/netsec or Slack/Discord groups for specific tools and frameworks.

4. Prepare for Technical Assessments

   • Expect technical challenges such as log analysis or coding tasks to test your scripting knowledge.

   • Brush up on fundamentals like OSI layers, encryption algorithms, threat modelling, or commonly used security frameworks (e.g., MITRE ATT&CK).

5. Demonstrate Cultural Fit

   • Start-ups value adaptability, passion, and initiative. If you thrive in fast-paced environments and enjoy wearing multiple hats, emphasise that in interviews.

   • Showcase your enthusiasm for the company’s mission—whether it’s AI-driven detection, quantum-proof encryption, or blockchain security.

6. Be Open to Learning

   • If you don’t meet every listed requirement, emphasise your willingness and ability to pick up new tools or concepts quickly—especially in a domain as dynamic as cyber security.

By combining a strong technical foundation, relevant projects, and a proactive mindset, you’ll be well-positioned to catch a start-up’s eye—and potentially help shape the future of their security posture.

12. Ready to Kickstart Your Cyber Career? Register on CyberSecurityJobs.tech

As the Q3 2025 funding landscape makes clear, cyber security is brimming with opportunities, especially at start-ups forging cutting-edge solutions. If you want to connect with these high-potential companies quickly and effectively, CyberSecurityJobs.tech is your ideal launchpad.

Why Register Your Profile on CyberSecurityJobs.tech?

1. Curated Cyber Roles

   • Access a range of job postings—SOC analysts, threat hunters, pen testers, DevSecOps engineers, cryptographers, and more—tailored to your specialisation.

2. Personalised Alerts

   • Get notified immediately when roles matching your skill set and preferences (location, salary range, full-time vs. contract) become available.

3. Stand Out to Employers

   • Upload your CV and showcase your certifications, notable projects, or achievements in a dedicated cyber security community. Many start-ups search our database before posting jobs publicly.

4. Exclusive Resources

   • Access expert tips on CV building, interviews, and career development. Stay updated on the latest threat landscapes and best practices through our blog and newsletters.

5. Community and Networking

   • Join a specialised community of cyber security professionals, mentors, and peers. Sharing insights, challenges, and solutions can help you grow faster in your field.

How to Register

1. Create Your Account

   • Sign up for free on CyberSecurityJobs.tech. Use a strong password and enable MFA for added security!

2. Complete Your Profile

   • Highlight your cyber security areas of expertise, certifications, desired roles, and any unique achievements.

3. Upload Your CV

   • Emphasise relevant experience, measurable outcomes, and a concise but detailed description of your tech stack.

4. Set Job Alerts

   • Filter by role type, skill requirements, location preference, or remote/hybrid options to tailor your job notifications.

5. Search & Apply

   • Explore our curated listings from newly funded start-ups and established cyber security firms alike. With a few clicks, you can send a tailored application.

Tip: Updating your profile regularly with new certifications, project links, or skill developments will keep you visible to potential employers who frequently scout for talent.

Final Thoughts

In a world increasingly reliant on digital infrastructures, cyber security stands as both a critical function and a burgeoning industry. The Q3 2025 funding announcements underscore the immense potential and variety of opportunities available across the UK, from AI-powered threat detection at OmniShield AI to quantum-resistant cryptography solutions at CyberLockr. For job seekers, the message is clear: there’s never been a better time to carve out a thriving cyber security career.

By aligning yourself with newly funded start-ups, you can join teams that are not just employing the latest defensive techniques but actively inventing them. Whether your interests lie in SOC analysis, blockchain audits, cloud security, or bridging the gap between cyber security and sustainability, the roles are plentiful—and the impact is profound.

If you’re ready to embark on this exciting journey, don’t forget to register with CyberSecurityJobs.tech to gain immediate access to the best positions and resources in the field. Secure your future, shape the next generation of cyber defences, and play a pivotal role in protecting our interconnected world.