Civil Mechanical Engineer | UK

Civil Mechanical Engineer

6-month contract - Inside IR35 - Rate TBC

Clearance: Must hold or be eligible for SC security clearance

You will manage the design and integration of the Physical Infrastructure Layer. You will translate the space, power, and cooling needs of the Communications and IP teams into detailed requirements for our container and mast suppliers. You are the final authority on whether a physical solution is fit for purpose, ensuring it can be transported, deployed, and operated in the most demanding climates on Earth.

Your Focus: Deployable Structures, Power Distribution, HVAC, and Supplier Technical Oversight

Key Responsibilities

Infrastructure Design Integration

System-Level Architecture: Design the internal layout for the 6m (20ft) Core Container and the Tactical Box (Size, Weight, Power, and Cost).

Thermal Management (HVAC): Calculate the total thermal load of the Servers, Switches, Cores

Power Systems: Design the AC/DC power distribution architecture

Supplier Technical Management

Detailed Specification: Author and manage the Technical Requirements Documents (TRD)

Design Oversight: Review supplier CAD models for wind loading, and electrical schematics

Acceptance Testing: Lead Factory Acceptance Testing (FAT) at supplier sites to verify

Ruggedisation Compliance

Environmental Hardening: Ensure all enclosures meet MIL-STD-810H (for shock, vibration, humidity, and sand)

Ingress Protection: Guarantee external tactical boxes to protect against high-pressure water jets

Safety Ergonomics: Design internal rack accessibility and external mast deployment procedures

Documentation Lifecycle Support

The Physical Build Book: Create detailed assembly and maintenance manuals

Field Support: Perform root-cause analysis on mechanical failures (eg, mast deployment jams or HVAC leaks) identified during the build or trial stages.

Technical Proficiency Profile

CAD/CAM Tools: Proficiency in SolidWorks, Autodesk Inventor, or AutoCAD

Thermal Modeling: Experience with CFD (Computational Fluid Dynamics) tools

Power Engineering: Deep understanding of DC power systems (24V/48V)

Mast/Structural Systems: Knowledge of telescopic/pneumatic mast mechanics

Experience: With specifically focused on deployable shelters, mobile command centers, or tactical trailers.

Defense Standards: Proven experience

Project Management: Experience managing high-value technical suppliers and holding them accountable to tight delivery schedules.

SmartSourcing are a Disability Confident Employer and we promote, celebrate and value diversity, we are committed to promoting equality and inclusion for all.