Senior Technician Application Support (DV or CTS Cleared) - Windows, Linux, Unix, SQLLocation: Northwood, UK.Role Type: ContractOur client, a specialist IT consultancy focussing on Defence and Government projects, are seeking for a Application Support Engineer to support their clients critical infrastructure in Northwood, UK.Successful candidates will be expected to have experience working in international environments, ideally in the government, military or defence space. It is also crucial that applicants have valid DV or CTS clearance. Key Responsibilities: Administer, maintain, and troubleshoot Command and Control (C2) and situational awareness systems Install, configure, and support servers across multiple operational environments Execute application testing and deployment at both server and user level Deliver hands-on system support including preventive maintenance and fault resolution Set up and support hardware in dynamic, sometimes challenging locations Ensure accurate documentation, configuration control, and asset tracking Collaborate closely with internal teams and service desks for technical support Stay current on tech trends and assist with beta testing of new system releases Essential Skills and Experience: 5+ years in system administration across Windows and UNIX/Linux environments Strong experience with large-scale, service-oriented IT environments Proficient in SQL and database administration principles Hands-on knowledge of IT hardware, peripherals, and