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Senior UPS Field Service Engineer JOB DESCRIPTION About us Centiel SA is a Swiss technology company that designs, manufactures, and delivers industry-leading power protection solutions for critical infrastructure. Our range of class-leading, high-efficiency UPS systems provides maximum availability and reliability and has been developed by the innovators of the first transformerless UPS and the world’s first three-phase modular UPS. In the UK, Centiel is represented by its UK subsidiary, specialising in the design, specification, installation, commissioning, and ongoing maintenance of uninterruptible power supply systems and critical power solutions. Headquartered in Switzerland, Centiel combines Swiss engineering expertise with a global network of partners and subsidiaries. This enables Centiel UK to offer advanced UPS solutions, expert local support, and high-quality service to customers across the UK. Who we are looking for We are looking for a Senior UPS Field Service Engineer to join our growing UK service team. This is a field-based role supporting customers across the United Kingdom. Following appropriate training on Centiel products and procedures, you will lead and undertake the installation, commissioning, testing, maintenance and repair of single-phase and three-phase UPS systems. You will provide professional technical support to customers and colleagues while representing Centiel UK to the highest standards of safety, quality and customer service. Key responsibilities • Lead UPS start-up, commissioning, load-bank testing and site acceptance testing, and provide customer familiarisation training where required. • Complete planned preventative maintenance on Centiel and third-party UPS systems. • Lead or carry out complex remedial work as planned repairs or as part of an emergency callout. • Diagnose faults and carry out field and workshop-based repair, replacement and exchange activities, including the assessment and repair of equipment returned to the Centiel UK test facility. • Act as a point of technical escalation for complex faults; lead diagnosis and resolution of failures. • Support root cause investigations, review technical evidence and recommend corrective and preventive actions for recurring or significant failures. • Carry out battery maintenance, installation, replacement and testing in the workshop and on customer sites in accordance with approved procedures and safe systems of work. • Undertake site surveys and produce clear, accurate and timely site visit reports for the Sales, Projects and Service teams. • Prepare, review and follow site-specific risk assessments and method statements. • Identify opportunities for maintenance contracts, battery testing or replacement, system upgrades and equipment replacement, and pass these promptly to the appropriate commercial team. • Maintain company tools, test equipment, vehicles and stock in a safe, secure and serviceable condition. • Once trained and authorised on relevant products, participate in the on-call rota, providing 24/7 technical support and site response for Centiel and approved third-party UPS equipment. • Support the training and competence development of UPS Field Service Engineers and trainees through coaching, supervised field activities and structured feedback. This job description outlines the principal responsibilities of the role and may be reviewed periodically to reflect operational requirements. Skills, experience and qualifications • Experience working in a UPS or critical-power field-service role, including commissioning, fault diagnosis, maintenance and repair of single-phase and three-phase UPS systems. • Knowledge of UPS communication protocols, firmware, monitoring systems, static transfer switches and associated critical-power equipment. • Experience and understanding of customer mission critical infrastructure and environments. • Experience of fault finding and rectification of UPS and electrical infrastructure. • Ability to effectively communicate technical information and read electrical circuit diagrams. • Strong fault-finding, analytical and problem-solving capability within an electrical or electronic environment. • Ability to manage multiple tasks simultaneously, plan effectively, set priorities and coordinate work activities with others. • HNC/HND or equivalent qualification in Electrical/Electronic Engineering. • Practical competence with hand tools and electrical measuring and test equipment. • Commitment to electrical safety, safe isolation, risk assessment and environmental responsibilities. • Clear written and verbal communication skills, with the ability to produce accurate technical reports. • Customer-focused, professional and comfortable working independently on customer sites. • Basic numeracy, literacy and IT capability, including Microsoft Word, Excel and related Microsoft 365 applications. • A full, valid UK driving licence. • Willingness and ability to travel throughout the UK and stay away from home when required, typically for one working week per month. • Commercial awareness and an understanding of how technical decisions and conduct can affect customers and the business. Company values & behavioural competencies At Centiel, our values guide both our decisions and our daily behaviour. They define who we are and how we act — shaping the way we work together, serve our customers, and drive innovation. • Safety, integrity, respect, teamwork – act with honesty and care for people and the environment. • Own it – act with urgency – take responsibility, make things happen, and deliver with commitment. • Foster a customer-first mindset – listen, anticipate needs, and create lasting value through service excellence. • Lead by example – drive continuous improvement – challenge the status quo and share knowledge to grow together. • Think big and execute – combine ambition and discipline to turn ideas into tangible results. Every Centiel employee is expected to embody these values through proactive problem-solving, transparent collaboration, and a continuous desire to learn, improve, and contribute positively to our culture and brand. What we offer • Competitive basic salary plus overtime. • Fully expensed hybrid company car or van, according to employee choice and company policy. • Private pension scheme with a generous company contribution. • Private healthcare. • 23 days annual leave, plus bank holidays and the Christmas shutdown. • Comprehensive training on Centiel products and services. • Competitive on-call and working-away allowances. • Company mobile phone and laptop.