Posted:
February 19, 2026
Location:
greater london, England, United-Kingdom

Job Description

Position: Senior Mechanical Design Engineer (Renewable Thermal Systems)

Location: London/Hybrid
Salary: GBP55,000 – GBP65,000

We are looking for a specialist Mechanical Design Engineer to lead the transition from fossil fuel combustion to Large–Scale Heat Pump Technology. You will be responsible for the physics of the system ensuring that high–capacity heat pumps are integrated into hydronic circuits that actually deliver on their efficiency promises.

Core Technology Focus

1. Air Source Heat Pumps (ASHP)

  • Cascade Systems: Designing multi–unit ASHP arrays for commercial peak loads.
  • Defrost & Ambient Logic: Managing acoustic mitigation, airflow requirements, and defrost cycle impacts on system continuity.
  • Bivalent Integration: Designing systems that integrate ASHPs with existing LTHW or backup heat sources.

2. Ground Source Heat Pumps (GSHP)

Apply for this Job

Submit your application for the Senior Mechanical Design Engineer (Renewable Thermal Systems) position at Outsource Construction.

Apply Now Save for Later

Job Overview

Job Type: Full-time
Location: greater london, United-Kingdom
Posted: February 19, 2026
Deadline: March 31, 2026