Senior Facilities Engineer

About us

Plessey has a long history of innovation. Founded in 1956, we have evolved from one of Europe’s earliest semiconductor pioneers into the world’s most advanced MicroLED specialist. Over the decades, Plessey has built a first class, fully integrated platform designing, manufacturing, and engineering next-generation display technologies entirely in-house. This end to end capability, combined with our strong IP portfolio, uniquely positions us to lead the scaling of MicroLEDs from lab innovation to high-volume production.

Our future is even brighter. We believe MicroLEDs will define the next era of technology—powering ultra-efficient AR/VR displays, driving optical processors that make AI faster and more sustainable, and enabling devices yet to be imagined. With our unique expertise and talented team, we are positioned to lead this transformation.

It’s an exciting time to join us: Plessey has recently been acquired by Haylo Labs, accelerating our growth and opening new opportunities.

Our Values

• Innovation
• Collaboration
• Commitment
• Care

About the Role

We have an exciting opportunity for a mechanically biased Facilities Engineer to support the operations of our 13-acre semiconductor site in Plymouth. At the heart of this site lies a world-class cleanroom and fabrication facility spanning 3,390 m² of highly controlled manufacturing space, where cutting-edge MicroLED technology is developed and produced.

Key Responsibilities

• Own the mechanical systems across the facility, delivering safe, uninterrupted operations while improving and future-proofing our infrastructure
• Drive engineering enhancements across the site’s existing facilities, improving performance, reliability, and efficiency
• Working closely with the electrical lead, you will troubleshoot and resolve electrical, control, and mechanical system issues to keep operations running smoothly
• Monitor facility performance and implement preventive and predictive maintenance programs
• Coordinate and oversee contractors, vendors, and service providers for facility-related projects and services
• Lead facility improvement projects, including equipment upgrades, energy efficiency initiatives, and space planning
• Troubleshoot system issues, diagnose root causes, and implement corrective actions
• Support capital planning and budgeting by assessing facility needs and preparing cost estimates
• Develop and maintain documentation, including maintenance records, technical reports, and compliance certifications
• Ensure workplace safety, reliability, and comfort for employees and visitors
• Collaborate with operations, EH&S, and leadership teams to support business continuity and sustainability goals

Experience & Attributes

• Minimum HNC in Mechanical Engineering (or equivalent experience)
• Previous experience as a Facilities or Maintenance Engineer in an industrial/manufacturing setting
• Hands-on knowledge of routine mechanical and electrical maintenance
• Strong understanding of building services such as: HVAC systems (temperature, humidity, cleanroom conditioning), Process cooling water systems, Air compressors, large chillers, cooling towers, High purity gas delivery systems, De-ionised water treatment plants, Effluent control systems (pH correction), Process exhaust systems, Industrial boilers
• Knowledge of health, safety, and legal compliance requirements
• Strong problem-solving ability with a logical, hands-on approach
• Able to multi-task, prioritise, and work under pressure
• Capable of working independently or within a team, with strong communication skills
• Organised, disciplined, and motivated with a proactive "can-do" attitude
• IT literate, comfortable with CMMS and/or BMS systems
• Ability to participate in continuous improvement teams and act as a member of the Emergency Response Team
• Comfortable working in a cleanroom environment

Advantage

• Background in manufacturing and cleanroom operations
• Familiarity with ISO cleanroom classifications and GMP standards
• Experience in energy efficiency or sustainability projects