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Network Administrator

Cornspring
Greater London
1 day ago
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** You must have the right to work in the UK - no visa sponsorship can be provided.

Cornspring is redefining data solutions for Family Offices, Asset Owners, and UHNW clients. Our AI-powered platform integrates, validates, and secures private financial data, allowing intelligent insights via Gen-AI and LLM-based conversations.

Security, privacy, and reliability are at the heart of everything we do. As we scale our technology and infrastructure, we are seeking a diligent and experienced Network Administrator to manage, secure, and optimize our internal and cloud network environments.

This is a critical role supporting the stability and integrity of Cornspring’s Microsoft-based infrastructure, ensuring seamless, secure connectivity across systems, users, and cloud services.

Key responsibilities

Overview

  • Responsible for the administration, maintenance, and performance of Cornspring’s internal networks, domain environment, and cloud-based services.
  • Ensure the company’s network and system infrastructure operate reliably, efficiently, and securely.
  • Collaborate with technology, security, and operations teams to support business continuity and employee productivity.

Network & Infrastructure Administration

  • Manage and maintain Microsoft Azure resources including virtual networks, firewalls, VPNs, and hybrid connectivity.
  • Administer and support NT domains, Active Directory, DNS, DHCP, and Group Policy Objects (GPOs).
  • Oversee network hardware and connectivity for offices and remote workers, ensuring consistent performance and availability.
  • Monitor network activity, bandwidth, and performance using established tools and best practices.
  • Manage user provisioning, authentication, and access across systems.

Microsoft 365 & Endpoint Management

  • Administer Microsoft 365 services including Exchange Online, Teams, SharePoint, and Intune.
  • Manage device enrolment, configuration, and compliance through Intune and Azure AD.
  • Ensure reliable and secure email, collaboration, and file-sharing capabilities for all users.
  • Support user onboarding/offboarding processes and maintain accurate access records.

Security & Maintenance

  • Apply security updates, software patches, and configuration changes in line with our security policies.
  • Support endpoint protection and device compliance under the company’s security policies.
  • Conduct regular network and system health checks, backups, and disaster recovery tests.
  • Collaborate with the Head of Information Security on implementing zero-trust and identity management principles where relevant.

Support & Operations

  • Provide 2nd and 3rd level technical support for network, server, and connectivity issues.
  • Document network configurations, standard operating procedures, and troubleshooting guidelines.
  • Work closely with vendors and service providers to ensure uptime and efficient issue resolution.

Requirements

Experience

  • 5–10 years of experience in network and system administration, in a Microsoft-centric environment.
  • Strong background in Microsoft Azure, NT domains, Active Directory, and Microsoft 365 administration.
  • Experience managing hybrid or cloud-based infrastructures with distributed teams.
  • Familiarity with ITIL-based service management practices and monitoring tools.

Technical Skills

  • Proficiency in Azure networking, Active Directory, Group Policy, DNS/DHCP.
  • Experience managing Azure AD Connect, Conditional Access, Intune, and device compliance policies.
  • Good understanding of network fundamentals (LAN/WAN, VPNs, VLANs, routing, switching).
  • Awareness of common security best practices such as least privilege, MFA enforcement, and secure configuration.

Mindset & Attributes

  • Methodical, detail-oriented, and proactive in problem-solving.
  • Strong communication and documentation skills.
  • Reliable and consistent in delivering operational excellence.
  • Comfortable working in a fast-paced, high-accuracy environment where reliability and confidentiality are essential.

Benefits

  • Competitive compensation and performance-based bonus. 
  • Hybrid working: we work from a beautiful office in Bank 3 days a week.
  • Being part of a revolutionary movement in Family Office technology.
  • Working with cutting-edge AI and data technologies. 
  • Challenging projects that make a real impact to our sector.

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