Facilities Maintenance Technician
Greenjets builds propulsion for uncrewed and electric aircraft, from electric ducted fans to geared turbofans, and supplies NATO and the UK MoD. They're hiring a Facilities Maintenance Technician to maintain buildings, utilities and infrastructure across its engineering and manufacturing site, based on-site in Milton Keynes. This operations role sits within the UK's aerospace and defence sector.
About Us
Greenjets is an innovative engineering company developing high-performance propulsion systems for the aviation market. Our work spans research and development, engine production, aircraft systems, technical integration and flight testing. We are committed to delivering high-grade engineering and best-in-class propulsion for unmanned aircraft.
We do things differently. We move fast, we experiment and we adopt technologies that push beyond the current state of the art. Our aim is to go further, faster and more efficiently, while keeping costs competitive.
All our propulsion systems are designed, developed and manufactured in the UK. We focus on high quality, reliable and cost effective products supported by a robust, secure and ethical supply chain.
Role Overview
The Facility Maintenance Technician is a hands‑on, site‑based role responsible for the day‑to‑day maintenance, repair, and upkeep of buildings, utilities, and supporting infrastructure across a modern engineering and manufacturing environment.
The role is critical to keeping the site safe, compliant, and operational, supporting production, engineering and office teams by ensuring facilities issues are resolved quickly and effectively.
This is a practical, delivery‑focused role suited to someone comfortable working across mechanical, basic electrical, and general building maintenance tasks, with strong ownership and a proactive mindset.
Key Responsibilities
Facilities Maintenance & Reliability
Carry out planned and reactive maintenance across the site, including:
Building fabric (doors, fixtures, flooring, minor repairs)
Lighting, basic electrical systems and power outlets
Plumbing, water systems and minor drainage issues
HVAC interfaces and basic fault reporting
Respond promptly to facilities issues that could impact safety, production, or operations
Perform regular site walk‑rounds, identify defects, and raise or complete corrective actions
Ensure plant rooms, risers, stores and external areas are kept safe and orderly
Preventive Maintenance
Support and execute planned preventive maintenance (PPM) schedules
Maintain basic asset registers and maintenance records
Assist in building out structured maintenance regimes as sites scale
Identify repeat issues and contribute to long‑term fixes, not just short‑term repairs
Contractor Support & Coordination
Escort and supervise external contractors on site where required
Support permit‑to‑work and contractor safety compliance
Ensure contractor works are completed safely, to standard, and documented
Health, Safety & Compliance
Work in line with all H&S procedures, RAMS, PUWER and site policies
Proactively identify hazards and raise safety concerns
Maintain safe working practices at all times, including housekeeping and tool control
Support audits, inspections and compliance checks when required
General Site Support
Assist with basic site moves, layouts and minor fit‑out works
Support installation of benches, racking, signage and tooling
Help maintain a professional, production‑ready working environment
Act as a practical point of contact for day‑to‑day facilities issues
Skills & Experience
Essential
Proven hands‑on experience in facilities, building maintenance, or site services
Practical skills covering mechanical, basic electrical, plumbing or general maintenance
Ability to troubleshoot, diagnose and fix issues methodically
Strong awareness of health & safety in an industrial or workshop environment
Reliable, organised and comfortable working independently
Desirable
Experience in manufacturing, engineering, or industrial facilities
Relevant trade background or practical qualification
Experience working with PPM schedules or CMMS systems
Basic understanding of HVAC, compressors, or utilities infrastructure
Forklift, IPAF or similar certifications
Behavioural Profile (What Good Looks Like)
Takes ownership of problems and sees them through
Practical, calm and solution‑focused under pressure
Comfortable supporting multiple teams and priorities
Keeps standards high without over‑engineering solutions
Communicates clearly and escalates issues appropriately
What This Role Is Not
Not a desk‑based facilities admin job
Not a purely reactive “call‑out only” role
Not contract management or engineering sign‑off authority
This is a hands‑on, sleeves‑rolled‑up site role, fundamental to keeping operations moving.
About Greenjets
Greenjets was founded in 2022 by chief executive Anmol Manohar and chief technology officer Dr Guido Monterzino, and builds propulsion for uncrewed and electric aircraft, with a portfolio running from electric ducted fans to geared turbofan engines. Products include the Sycamore 160 and Aspen 212, designed for higher efficiency, greater speed and a lower acoustic signature than conventional designs, and the team draws on Rolls-Royce, General Electric, BAE Systems and Formula 1 experience. The company sells to NATO, the UK MoD and the German MoD, and was selected under the MoD's Low-Cost Air Defence Effectors programme to build a British low-cost drone interceptor. It grew from 160 to more than 250 staff and expanded UK facilities from 12,000 to nearly 70,000 square feet. The $40M Series A was led by Blossom Capital, with the NATO Innovation Fund, the National Security Strategic Investment Fund, Tanglin Ventures and NSFO Family Office.