Mitie
Senior Commissioning Engineer - Mitie Power & Grid
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Senior Commissioning Engineer - Mitie Power & Grid
Senior Commissioning Engineer – Rock Power Connections
Mitie Power & Grid brings together three ICP business units—G2 Energy, ESM Power, and Rock Power Connections—alongside Custom Solar, the UK's leading behind-the-meter solar PV installer. With over 400 specialist professionals across our ICP and solar teams—and access to thousands more engineering experts within Mitie—we are one of the UK's largest and most experienced providers of grid connection and renewable energy services. Our focus is supporting decarbonisation through projects including utility-scale solar, wind, battery energy storage (BESS), and EV infrastructure.
About the Role
We are currently recruiting for a Senior Commissioning Engineer to join the Rock Power Connections Technical Operations Team. In this role, you will undertake commissioning activities and duties on a wide range of distribution power system plant, control and protection, and substation equipment to a high level of competence.
Responsibilities
Health, Safety, Environmental & Quality
- Attend all company authorisation/induction courses as required by Mitie Power & Grid
- Ensure personally held test equipment is maintained in good working order, within calibration, and initiate recalibration within appropriate deadlines
- Maintain a safety and zero lost hours culture through:
- Proactive adherence to site safety rules
- Correct use of PPE
- Offering improvements for safety and environmental processes
- Reporting hazards and corrections where applicable
- Following company-specific safety rules
Testing & Commissioning
- Be flexible to travel across the UK when required, subject to fair and reasonable notice
- Attend Commissioning Panel Meetings as necessary
- Lead commissioning activities for designated projects, coordinating commissioning tasks and acting as the customer liaison point
- Complete Commissioning Inspections, including off-load and on-load commissioning, in line with DNO/IDNO procedures
- Prepare and collate commissioning documentation (e.g., drawing mark-ups, test data) for final project folders
- Plan, write, and manage:
- Commissioning programs
- Commissioning method statements
- Inspection schedules
- Conduct comprehensive testing and final commissioning on various plant and equipment (including fault investigation, diagnostics, and rectification of faults) aligned with client specifications
- Participate, conduct, and support Factory Acceptance Tests (FATs)
- Mentor apprentice commissioning engineers as needed and embody strong staff development values
- Identify training needs related to specific products for seamless commissioning execution
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Day-to-Day Control
- Provide technical support and direction (within competence) to Rock Power Connections’ Project Team, reinforcing technical standards
- Liaise with and consult internal (and client) Design Engineers to resolve design-related queries effectively
- Undertake temporary tasks/admin within your competence area as required by the company
- Report progress (or issues) to Site Managers, Operations Managers, or Engineers responsible for project delivery
- Assist and support the field team with:
- Technical queries
- Quality plans
- Project commissioning programs
- Risk assessments (RAMS)
- EHS objectives
Requirements
Key job requirements include:
- Working Safely certification (equivalent to a Safety Passport)
- HNC or Degree in Electrical Engineering
- DNO Competent Person qualification
- Compassionate knowledge of CDM regulations
- Demonstrable extensive experience as a Commissioning Engineer in the Electricity Supply Industry, spanning:
- LV, MV, HV, and voltage schemes
- Protection schemes and relay systems (including primary/secondary testing)
- DC & AC systems
- Proven fault-finding & system integration capability
- Strong understanding of permit control and isolation protocols (e.g., National Grid ESO (NGED), SSE)
Who Are Rock Power Connections?
Since our acquisition by the Mitie Group (2022), we’ve delivered landmark projects:
- Expanded EV charging infrastructure at heavily trafficked UK hubs
- Collaborated with high-profile clients such as:
- HS2 (high-speed rail network)
- Gridserve Electric Highway
- Continued supporting our NGED framework agreement, focusing on:
- New substation installation
- Asset replacement
- $-$11kV through to 132kV reinforcement projects
Get help with your application
Your very own career expert that helps elevate your application to the next level.
Our unique people-centric approach has been pivotal to our success. Rock values a culture that stresses skills, growth, and results—all under a family-friendly ethos laddered with Mitie’s next-generation corporate serviice promise.
Our Commitment to Diversity
We thrive on diversity, celebrating the characters of over 130 represented nationalities. Our inclusive culture embraces employees from all backgrounds—regardless of ethnicity, gender, age, religion, disability, or identity—listening and learning from the rich variations that fuel our collective ambition. Through energy harnessed from unique voices, Rock Power Connections activates positive change for society.
Benefits
Health & Wellbeing
- A virtual GP service for expert advice (video/phone)
- Salary Finance schemes:
- Advance up to 50% of earned pay pre-payday (for a small fee)
- Competitive loans
Flexible Lifestyle Choices
- Link to our dedicated benefits platform, Choices, where you can select perks such as:
- Up to 5 extra days’ holiday
- Critical illness insurance
- Dental treatments
- Tech and homewares discounts (no sunk costs)
Retail & Lifestyle Perks
- MiDeals: Access discounts at high-street retailers, gyms, and services
- Cycle-to-work scheme
- Life cover: Up to four times your salary
- Enhanced pension contributions
- Save-as-you-earn scheme
- Mitie Matching Share Plan (free shares in Mitie + potential awards)
Recognition & Rewards
- Mitie Stars: Quarterly and annual prizes (including a £10,000 top prize), recognising outstanding efforts
Career Growth
- Commitment to a dynamic and varied learning and development program to advance your career at Mitie Power & Grid.
Since 1987, Mitie’s 80,000 global employees have driven robust facilities management and professional services across banking, government,healthcare, and education sectors alike.
Join Mitie’s Team. Together, diversity strengthens us.
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