Rugged Plastic Enclosure CAD Design for Portable Electronic Device

We are looking for an experienced CAD designer and product developer to design a custom, robust, and ergonomic plastic enclosure for a compact, portable electronic device intended for active, high-movement use.

Key Requirements:
- Enclosure Envelope: Maximum bounding dimensions are approximately 88.9 × 171.5 × 17.4 mm.
- Internal Component Integration: The design must securely house a custom printed circuit board (based on a provided STEP file), a specific compact battery, and an external auxiliary module.
- Ergonomics & Usability: The housing must feature athlete-friendly ergonomics with smooth contours, integrated external interface points (indicator visibility, external sensor placement, and side-mounted controls), and robust mounting/attachment options.
- Environmental Protection: The design must account for sealing requirements (splash/sweat resistance) and basic thermal management considerations.
- Manufacturing Readiness: The final design should be structured for prototyping (3D printing) with an eye toward future injection molding feasibility.

Deliverables:
- Complete design files (editable from sketches)
- Manufactured 3D CAD files (STEP/IGES) of the enclosure (top and bottom shells).
- Assembly drawings showing internal component positioning and sealing/fastening solutions.

Next Steps:
If you are interested, please share examples of previous handheld, wearable, or rugged electronics enclosures you have designed. Shortlisted candidates will receive the full technical specifications and CAD data to discuss feasibility and the detailed scope of work.