Senior Systems Administrator, IT Operations

About the Team

Our team is dedicated to supporting the secure and seamless operation of enterprise technology across identity, endpoint management, infrastructure, classified, and user support services. We work in close collaboration with our Security, Infrastructure, and Engineering teams to ensure our employees have reliable access to the systems and tools they need, all while maintaining strict compliance and security requirements within a regulated environment.

We're responsible for a broad mix of activities, including identity lifecycle management, endpoint support, operational troubleshooting, onboarding processes, and maintaining critical enterprise platforms. Team members gain valuable exposure to cutting-edge cloud technologies, infrastructure tooling, advanced security practices, and foster cross-functional collaboration in a dynamic, fast-paced environment.

This role offers an exceptional opportunity to build deep experience across enterprise IT and security operations, directly contributing to initiatives that enhance reliability, scalability, and user experience for the entire organization.

About the Role

We are seeking a proactive and skilled IT/Infrastructure professional to play a pivotal role in supporting our enterprise systems and day-to-day operations across identity, endpoint, and security-related platforms. You'll be instrumental in assisting with Okta administration, troubleshooting SSO/MFA issues, managing endpoints, streamlining onboarding processes, providing operational support, and collaborating closely with our Security and Infrastructure teams.

You'll work alongside experienced engineers and key stakeholders, contributing to the maintenance of secure, reliable services while gaining significant exposure to cloud infrastructure, automation, critical compliance requirements, and a wide array of enterprise technologies. This role is ideally suited for someone who thrives on problem-solving, enjoys learning new systems, and is eager to work across a variety of technical domains.

What You Will Do

• Perform Okta administration and support identity lifecycle management.
• Troubleshoot SSO/MFA issues and provide comprehensive user support.
• Coordinate effectively with security and infrastructure teams on critical initiatives.
• Participate in follow-the-sun operational support to ensure continuous service availability.
• Provide managed local IT support and deliver white-glove assistance to users.
• Manage IT asset lifecycles, including local stock and device management.
• Support secure onboarding processes for employees and contractors.
• Contribute to documentation and ensure process adherence in regulated environments.

Required Qualifications:

• Ability to obtain and maintain a UK security clearance to minimum SC level.
• Bachelor’s degree in a STEM field or equivalent practical engineering experience.
• 5+ years of relevant engineering, infrastructure, or technical program execution experience.
• Willingness to travel domestically and internationally as required (typically around 10%).

Technical Expertise:

• Demonstrable technical depth in one or more of the following domains: DevSecOps, software engineering, infrastructure engineering, or cloud infrastructure.
• Hands-on experience with:
  • Infrastructure as Code: Terraform
  • Cloud Platforms: AWS
  • Network Security: TLS, PKI, firewalls, VLANs
  • Virtualisation Technology: VMWare, KVM/QEMU
  • Linux Operating Systems: Scripting and automation tooling, particularly Ubuntu and RHEL
• Experience with IAM/security platforms such as Okta, Entra ID/Azure AD, Google Workspace, and MDM tools.
• Proficiency in endpoint management platforms (e.g., Jamf, Intune, Kandji, SCCM).
• Familiarity with asset management and ticketing systems.
• Experience in enterprise support operations.
• Strong stakeholder communication skills and a customer-service mindset.

Preferred Qualifications

• Experience designing or maintaining distributed systems, secure networks, or infrastructure supporting autonomy, AI/ML, or big data workloads.
• Demonstrated ability to work across technical disciplines, influence without authority, and operate effectively in ambiguous and fast-paced environments.
• Experience working with international partners or navigating multi-nation technical or policy workflows.
• Hands-on experience with physical hardware, including rack-mounted storage, compute, and networking.
• Knowledge of network cryptography and VPN solutions (both software and accelerated/dedicated hardware).
• Familiarity with hardening standards such as FIPS, STIG, and CIS.
• Understanding of compliance standards like ISO, NIST, and Secure by Design principles.
• Experience with air-gapped or highly restricted networks