NSL - Support Engineer

Senior Application Support Engineer (NSL) - Contract Start: ASAP Duration: until end mf March 2027 Location: full time onsite in London Rate: up to £1000 per day (inside IR35) Clearance: UKSV SC required, with candidates in the DV pipeline About the role We are seeking an experienced Application Support Engineer to join a small team supporting a complex, multi-technology application. The role involves day-to-day operational support, service improvement and the successful implementation of system changes in line with agreed service levels. This is an opportunity for a proactive and adaptable engineer who can work independently, take ownership of technical issues and build effective relationships with clients and technical teams. The successful candidate will contribute to the continued support and development of a critical application within a secure environment. Key responsibilities Provide application support, managing incidents, problems, service requests and changes in line with SLAs. Diagnose and resolve technical issues, ensuring effective service recovery and accurate service records. Support system changes, small enhancements and proactive application management, including health checks, patching and monitoring. Liaise with clients, subcontractors and development teams, including occasional travel to UK datacentres. Produce service and critical incident reports, maintain technical...