National AI Awards 2025Discover AI's trailblazers! Join us to celebrate innovation and nominate industry leaders.

Nominate & Attend

Senior Security Engineer (London)

Gallagher
London
2 weeks ago
Applications closed

Related Jobs

View all jobs

Senior Security Engineer

Senior Security Engineer

Senior Security Engineer - Automation

Senior Security Engineer, AWS Security

Senior Security Engineer London

Senior Security Engineer

Introduction

Indulge your passion for problem-solving and embrace the thrill of addressing risk head-on at Gallagher's global brokerage team. Join a family of diverse minds, united by a relentless pursuit of excellence. As part of our team, you'll be the architect of protection, safeguarding businesses and empowering their ambitions. Together, we'll build a legacy of trust and triumph in the dynamic world of risk management.

We believe that every candidate brings something special to the table, including you! So, even if you feel that you’re close but not an exact match, we encourage you to apply.


Overview

We are looking to add an experienced Senior Security Engineer to our Gallagher Technology Team. This role will be part of the global security architecture and engineering function in the UK, working closely with twin teams in the US and APAC regions.

What makes this opportunity outstanding? At Gallagher, we believe in balancing professional excellence with a fulfilling work-life balance. We offer hybrid working, allowing you to spend two days a week in the office and three days working from home.

Join a world-class team committed to driving exceptional security standards and making a real impact!


How you'll make an impact

  • Define and build Information Security engineering standards, artefacts, design patterns, and technical specification documents.
  • Provide engineering expertise across all network products, focusing on Next Gen Firewalls (Palo Alto, Cisco ASA’s), Secure Web Gateway (Zscaler), and Endpoint solutions with a focus on Trellix/McAfee product and Ms Defender product suites.
  • Take ownership and build Low Level Design (LLD) and operational run books based on the level 1 architecture design.
  • Expert level knowledge on Network Protocols, Remote Connectivity, Threat Prevention, Sandbox, DDoS, URL Filtering, and SSL decryption.
  • Participate in troubleshooting design level issues.
  • Assess, monitor, and recommend improvements to the global network security architecture to improve security posture, mitigate risks, and balance costs.
  • Apply skills to security services and help build and protect enterprise systems, applications, data, and assets across multiple geographic regions.
  • Proactively identify technical and architectural risks, providing alternatives for improvement.
  • Collaborate and partner with different collaborators throughout the organization to ensure alignment with the overall intended design.
  • Collaborate with architects, engineers, and staff across various teams to ensure compliance with GCIS policies.


About You

  • Previous experience working with Firewalls(especially Zscaler), Web Proxies, and Endpoint Security Solutions.
  • Hands-on experience working with cloud service providers (Azure and AWS).
  • Expert-level understanding of operating systems, antivirus, and malware lifecycle.
  • Experience in troubleshooting and identifying performance/operational issues and remediating them.
  • Problem solver with a desire to close issues, pragmatic and realistic with solutions.
  • Self-motivated achiever who gains happiness from providing excellent customer service.
  • Ability to quickly grasp and interpret salient information.
  • Excellent written and verbal communication skills, with an ability to present technical challenges to both technical and non-technical audiences, internal and external to the organization.
  • Flexible and resilient, able to handle various demands, both planned and unplanned.
  • Proven ability to balance multiple tasks and projects simultaneously.
  • Eligibility to work in the UK.


Compensation and benefits

On top of a competitive salary, great teams and exciting career opportunities, we also offer a wide range of benefits.

Below are theminimum core benefitsyou’ll get, depending on your job level these benefits may improve:

  • Minimum of 25 days holiday, plus bank holidays, and the option to ‘buy’ extra days
  • Defined contribution pension scheme, which Gallagher will also contribute to
  • Life insurance, which will pay 4x your basic annual salary, which you can top-up to 10x
  • Income protection, we’ll cover up to 50% of your annual income, with options to top up
  • Health cash plan or Private medical insurance

Other benefits include:

  • Three fully paid volunteering days per year
  • Employee Stock Purchase plan, offering company shares at a discount
  • Share incentive plan, HMRC approved, tax effective, stock purchase plan
  • Critical illness cover
  • Discounted gym membership, with over 3,000 gyms nationally
  • Season ticket loan
  • Access to a discounted voucher portal to save money on your weekly shop or next big purchase
  • Emergency back-up family care
  • And many more…

We value inclusion and diversity

Inclusion and diversity (I&D) is a core part of our business, and it’s embedded into the fabric of our organisation. For more than 95 years, Gallagher has led with a commitment to sustainability and to support the communities where we live and work.

Gallagher embraces our employees’ diverse identities, experiences and talents, allowing us to better serve our clients and communities. We see inclusion as a conscious commitment and diversity as a vital strength. By embracing diversity in all its forms, we live out The Gallagher Way to its fullest.

Gallagher is Disability Confident Committed. We have pledged to make sure our recruitment process is inclusive and accessible, in addition to supporting our existing employees with any long-term health conditions or disabilities.

We understand that applicants may have disabilities, if you do, you may find some parts of the recruitment process more challenging than others. Don’t worry, we’re here to help, however, we can only do this if you let us know.

Should you require reasonable adjustments to your application, please get in touch with . If you’d prefer to speak on the phone, please request a call back, leaving details, so we get in touch.

Our employing entity, Arthur J. Gallagher Services (UK) Limited, is proud to be accredited as a Living Wage employer with the Living Wage Foundation. We are committed to diversity and opportunity for all and are opposed to any form of less favourable treatment on the grounds of gender or gender identity, marital status, civil partnership status, parental status, race, ethnicity, colour, nationality, disability, sexual orientation, religion/ belief, age and those with caring responsibilities.

Gallagher believes that all persons are entitled to equal employment opportunity and prohibits any form of discrimination by its managers, employees, vendors or customers based on race, color, religion, creed, gender (including pregnancy status), sexual orientation, gender identity (which includes transgender and other gender non-conforming individuals), gender expression, hair expression, marital status, parental status, age, national origin, ancestry, disability, medical condition, genetic information, veteran or military status, citizenship status, or any other characteristic protected (herein referred to as “protected characteristics”) by applicable federal, state, or local laws.

Equal employment opportunity will be extended in all aspects of the employer-employee relationship, including, but not limited to, recruitment, hiring, training, promotion, transfer, demotion, compensation, benefits, layoff, and termination. In addition, Gallagher will make reasonable accommodations to known physical or mental limitations of an otherwise qualified person with a disability, unless the accommodation would impose an undue hardship on the operation of our business.

  • Previous experience working with Firewalls(especially Zscaler), Web Proxies, and Endpoint Security Solutions.
  • Hands-on experience working with cloud service providers (Azure and AWS).
  • Expert-level understanding of operating systems, antivirus, and malware lifecycle.
  • Experience in troubleshooting and identifying performance/operational issues and remediating them.
  • Problem solver with a desire to close issues, pragmatic and realistic with solutions.
  • Self-motivated achiever who gains happiness from providing excellent customer service.
  • Ability to quickly grasp and interpret salient information.
  • Excellent written and verbal communication skills, with an ability to present technical challenges to both technical and non-technical audiences, internal and external to the organization.
  • Flexible and resilient, able to handle various demands, both planned and unplanned.
  • Proven ability to balance multiple tasks and projects simultaneously.
  • Eligibility to work in the UK.
  • Define and build Information Security engineering standards, artefacts, design patterns, and technical specification documents.
  • Provide engineering expertise across all network products, focusing on Next Gen Firewalls (Palo Alto, Cisco ASA’s), Secure Web Gateway (Zscaler), and Endpoint solutions with a focus on Trellix/McAfee product and Ms Defender product suites.
  • Take ownership and build Low Level Design (LLD) and operational run books based on the level 1 architecture design.
  • Expert level knowledge on Network Protocols, Remote Connectivity, Threat Prevention, Sandbox, DDoS, URL Filtering, and SSL decryption.
  • Participate in troubleshooting design level issues.
  • Assess, monitor, and recommend improvements to the global network sec
National AI Awards 2025

Subscribe to Future Tech Insights for the latest jobs & insights, direct to your inbox.

By subscribing, you agree to our privacy policy and terms of service.

Industry Insights

Discover insightful articles, industry insights, expert tips, and curated resources.

LinkedIn Profile Checklist for Cybersecurity Jobs: 10 Tweaks to Supercharge Recruiter Engagement

In the ever-evolving realm of cybersecurity, having a LinkedIn profile that reflects both your technical prowess and threat-hunting acumen is vital. Organisations are on the lookout for professionals skilled in penetration testing, incident response, security architecture and compliance. With hiring managers scanning dozens of profiles daily, your profile needs to not just rank in searches but convey your expertise in safeguarding digital assets. This step-by-step LinkedIn for cybersecurity jobs checklist offers ten practical tweaks to supercharge recruiter engagement. Whether you’re an aspiring security analyst, a seasoned penetration tester or a chief information security officer aiming for board-level roles, these actionable optimisations will sharpen your LinkedIn presence and position you as a top infosec candidate.

Part-Time Study Routes That Lead to Cyber Security Jobs: Evening Courses, Bootcamps & Online Masters

The frequency and sophistication of cyber-attacks have exploded in recent years, making cyber security one of the UK’s most in-demand skill sets. From safeguarding NHS patient data to defending FTSE 100 financial systems, organisations across sectors require qualified professionals—penetration testers, security analysts, incident responders and security architects—to protect critical infrastructure. Yet many professionals cannot pause their careers to upskill full time. Fortunately, an ecosystem of part-time learning pathways—evening courses, intensive bootcamps and flexible online master’s programmes—enables you to learn cyber security while working. This comprehensive guide explores every route: foundational CPD, immersive bootcamps, accredited online MScs, plus funding options, planning strategies and a real-world case study. Whether you’re an IT support technician, a software developer or a compliance manager aiming to pivot into security, you’ll discover how to build expertise at your own pace.

The Ultimate Assessment-Centre Survival Guide for Cyber Security Jobs in the UK

Assessment centres for cyber security positions in the UK are designed to mirror real-world threat landscapes and test both your technical acumen and soft skills under pressure. Across multiple stages—psychometric assessments, penetration testing exercises, incident response group tasks, case studies, interviews and even informal networking breaks—employers assess your ability to identify vulnerabilities, collaborate in high-stakes scenarios and communicate effectively. This guide walks you through each component, equipping you to stand out and secure your next role in cyber defence.