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# Senior Cross Domain Engineer

- **Company:** Synapri Ltd
- **Location:** Glasgow, UK
- **Experience:** Expert
- **Contract:** Temporary contract
- **Skills:** Microsoft Windows, Active Directory, Agile Methodology, Amazon Web Services, Systems Engineering, Architectural Patterns, Confluence, JIRA, User Authentication, Microsoft Azure, Cloud Computing, Cyber Security, Data Transmissions, Dynamic Host Configuration Protocol, DevOps, Domain Name System (DNS), Monitoring of Systems, Information Systems Security Architecture Professional, Windows Servers, Public Key Infrastructure, Windows PowerShell, Zero Trust Network Access, Security Information and Event Management, Virtualization Technology, VMware VSphere, Software Vulnerability Management, Google Cloud, SC Clearance, Information Technology, Patch Management, Cyber Warfare
- **Published:** September 11, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=01f9e6be0cba9d52

## About the Role

* 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

Cross Domain 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.

Infrastructure & Engineering

 * 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.

Desirable

 * 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.

Supplementary Information

 * 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).