Senior IT Systems Administrator (Windows) in London

Verve is a global ad-tech company that owns and operates a fully integrated advertising stack, spanning demand, supply, and data. We work with over 10,000 publishers and reach 2.5 billion consumers across the Americas, EMEA, and APAC. As the digital advertising landscape shifts away from walled gardens and third-party identifiers, Verve is focused on building the infrastructure that supports a more open, accountable internet. The ideal candidate is a level-headed, hands-on specialist with deep experience configuring, managing, and troubleshooting hardware and software. You're fluent in MacOS, Windows, Google Workspace, Microsoft O365, WiFi networks, and current security protocols. You'll provide direct support to team members while driving long-term operational IT projects.

Infrastructure & Project Leadership

• Own and drive long-term IT infrastructure projects from scoping through delivery including network upgrades, cloud migrations, security hardening, and tooling improvements.
• Design, implement, and continuously improve automated provisioning and systems management pipelines (CI/CD for IT tooling, endpoint management).
• Plan capacity, budget, and resourcing for infrastructure initiatives, and report progress, risks, and outcomes to leadership.
• Serve as technical escalation point for the Systems Administrator team and step in on complex issues, mentor, and help build team knowledge.
• Assist with or own high-complexity onboarding and offboarding workflows, ensuring security and access policies are followed.
• Perform and improve maintenance activities: backups, patch management, license audits, and monitoring.
• Create and improve IT documentation and internal knowledge bases.
• Respond to critical incidents and drive root cause analysis and permanent resolution.

Security & Networking

• Manage firewall policies and office infrastructure.
• SSO, MFA, and lifecycle provisioning across Google Workspace, Office 365, and Slack.
• Maintain network architecture (VLANs, routing, DNS/DHCP, Wi-Fi) and Cisco Meraki hardware across office locations.

Programming & Automation

• Write scripts and tooling (Python, Bash, PowerShell, or similar) to automate repetitive workflows, improve reliability, and reduce manual toil.
• Provide support with audit and compliance evidence collection (e.g. Establish version control, testing, and documentation standards for IT scripts and tooling using Git-based workflows).

Critical issues get a fast, calm response, real root-cause analysis rather than band-aids so the same problem doesn't resurface.

Qualifications

• Strong experience in IT Systems Administration or infrastructure roles in a corporate environment.
• Advanced proficiency with Office 365 and Google Workspace.
• Strong experience with automated deployment and MDM platforms (Intune, Mosyle, Kandji, JAMF, or equivalent) for Mac and Windows.
• Solid networking foundation: routing, switching, VLANs, firewalls, DHCP, DNS.
• Hands-on experience managing and troubleshooting firewall and network hardware (Cisco Meraki experience strongly preferred).
• Scripting or programming proficiency in at least one language (Python, Bash, PowerShell, Go, or similar).
• Azure AD / Microsoft Entra ID, Okta, or equivalent SSO/IdP.
• Demonstrated ability to independently manage multi-month infrastructure or process improvement projects.
• Experience with video conferencing systems (Zoom, Google Meet, meeting hardware).