Senior Cross Domain Engineer

Location: Glasgow (hybrid working - 2-3 days onsite)

Duration: 12 months +

Vetting: SC security clearance will be required

Significant experience as a Senior Platform Engineer, Infrastructure Engineer, Systems Engineer, or Cross Domain Engineer within complex enterprise, defence, government, or highly regulated environments.
Proven experience designing, implementing, supporting, and troubleshooting Microsoft Windows Server infrastructure.
Strong technical knowledge of:
Windows Server 2016, 2019 and 2022
Active Directory
Group Policy
DNS
DHCP
Public Key Infrastructure (PKI)
Certificate Services
Identity and Authentication Services
PowerShell
VMware vSphere and Virtualisation Technologies

Proven experience supporting, engineering, operating, or assuring High Assurance Gateways (HAGs), Cross Domain Solutions (CDS), or trusted information exchange platforms.
Strong understanding of Cross Domain architectural patterns including:
One-way information transfer (Data Diodes)
Two-way controlled information exchange
Multi-Level Security architectures
Trusted Gateway Services
Secure Replication Services
Guard-based Information Exchange
Experience implementing and managing information release policies, content validation controls, file sanitisation processes, malware inspection, and data transfer governance.
Strong understanding of trust boundaries, security domains, data segregation, and secure information sharing principles.
Experience supporting security accreditation, assurance activities, and evidence generation for classified systems and regulated environments.
Strong understanding of cryptographic services, encryption technologies, PKI, certificate lifecycle management, and secure communications.
Experience assessing and mitigating risks associated with classified information exchange and trusted data transfer mechanisms.
Experience integrating Cross Domain technologies with enterprise infrastructure services including Active Directory, Identity Services, Security Monitoring platforms, SIEM tooling, and Windows infrastructure.
Knowledge of secure information exchange requirements across Government, Defence, National Security, or Critical National Infrastructure environments.

Advanced PowerShell scripting and automation experience.
Strong understanding of Windows platform lifecycle management, system hardening, patch management, and vulnerability remediation.
Experience troubleshooting complex infrastructure and platform issues at 3rd and 4th Line support levels.
Demonstrable experience operating within Agile, DevOps, or product-aligned delivery teams.
Experience using infrastructure monitoring, performance management, and operational tooling.
Working knowledge of Jira, Confluence, and IT Service Management platforms.
Good understanding of hybrid environments incorporating on-premise and cloud-hosted services.
Familiarity with NCSC security guidance, Secure by Design principles, Zero Trust architectures, and UK Government security frameworks.

Experience supporting products from vendors such as Everfox (Deep Secure/Garrison), Owl Cyber Defense, Opswat, Viasat CDS, Forcepoint, or similar Cross Domain technologies.
Experience working within MOD, Defence Digital, Home Office, Cabinet Office, UKIC, Law Enforcement, or other secure government programmes.
Relevant qualifications in Computer Science, Information Technology, Systems Engineering, Cyber Security, or equivalent practical experience.
Experience supporting cloud infrastructure platforms including Microsoft Azure, AWS, and GCP.

The role may require occasional out-of-hours work to support maintenance activities, security updates, platform upgrades, and major incident response.
Occasional travel between organisational locations may be required.
Candidates must hold current SC Clearance and be willing and eligible to obtain Developed Vetting (DV).

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