Senior Systems Administrator, IT Operations

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.

As a Senior Systems Administrator, you will 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.

Key Responsibilities:

• 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.

Requirements:

• 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.

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.