Technical Services Supervisor - CNI

Mitie Cleaning & Hygiene Services; Warwick; On-site; GBP 50,000 - 65,000; Full time

Benefits offered by this job

Virtual GP

Salary Finance

Extra holidays

MiDeals discounts

Cycle to work

Life cover

Enhanced pension

Share plan

Mitie Stars prize

Job summary

Mitie is seeking a CNI Technical Services Supervisor to support a new critical infrastructure facility in Coleshill. The role covers commissioning, IST, mobilisation and transitioning into day‑to‑day technical supervision of engineering services.

You will work with Technical Services Manager, client stakeholders and specialists to ensure safety, reliability and continuity of critical systems as the facility moves from commissioning to live operation.

Qualifications

• Strong electrical, mechanical or building services engineering background.
• Experience in complex, critical or highly regulated environments.
• Clear communication and collaborative working style.
• Ability to own day-to-day technical activities and escalate issues as needed.
• Relevant engineering qualification or equivalent knowledge.

Responsibilities

• Coordinate IST, commissioning, handover and mobilisation activities within Mitie’s scope.
• Work with project teams, commissioning specialists and contractors to understand critical systems.
• Support engineering assurance and ensure risks, defects and actions are identified and escalated.
• Develop operating procedures, Safe Systems of Work and maintenance arrangements for live operation.
• Assist with engineering familiarisation, training and competence development.
• Supervise planned and reactive maintenance as the facility becomes operational.

Skills

Electrical engineering

Mechanical engineering

Building services

Project coordination

Stakeholder engagement

Education

Engineering qualification

Job description

Better places, thriving communities.

ROLE: CNI Technical Services Supervisor

HOURS: Full Time

LOCATION: Coleshill / East Birmingham

At Mitie, our people are our greatest strength. We want to create a place where everyone can thrive, develop and be their best every day.

We’re looking for a CNI Technical Services Supervisor to join our team, supporting the mobilisation and future operation of a new critical infrastructure facility in Coleshill.

The facility is being developed in line with data centre and critical-environment operating principles, with a strong focus on resilience, availability and operational continuity. Joining during the commissioning phase offers a unique opportunity to develop an in‑depth understanding of the facility and its critical systems before it transitions into full operation.

You’ll work closely with the Technical Services Manager, project and commissioning teams, specialist contractors and client stakeholders, taking an active role in Integrated Systems Testing (IST), commissioning, mobilisation and operational readiness.

As the facility moves into operation, the role will transition into the day‑to‑day technical supervision of the engineering service, helping to ensure critical systems continue to operate safely, reliably and effectively.

What You’ll Be Doing

During commissioning and mobilisation, you’ll provide practical technical support and day‑to‑day coordination across IST, commissioning and operational‑readiness activities. You’ll develop a detailed understanding of the facility, its systems and their dependencies, helping ensure knowledge gained during commissioning is carried forward into the operational team.

You’ll support technical reviews, system familiarisation, witnessing activities and the management of defects, risks and outstanding actions. You’ll also contribute to the development of operational procedures, Safe Systems of Work, maintenance arrangements and technical documentation.

Your Responsibilities Will Include

• Supporting the coordination of IST, commissioning, technical handover and mobilisation activities within Mitie’s operational scope.
• Working alongside project teams, commissioning specialists and contractors to understand critical systems, interfaces and dependencies.
• Supporting engineering assurance and ensuring technical risks, defects and outstanding actions are appropriately identified, recorded and escalated.
• Helping develop operating procedures, Safe Systems of Work, asset information and maintenance arrangements in readiness for live operation.
• Supporting engineering familiarisation, training and competence development as the operational team grows.
• As the facility becomes operational, supervising planned and reactive maintenance, specialist contractors and day‑to‑day engineering activities.

A key part of the role will be helping bridge the transition from project delivery and commissioning into a safe, resilient and fully operational critical environment.

Essential

What we’re looking for

You’ll have a strong electrical, mechanical or building‑services engineering background, with experience working in a complex, critical or highly regulated environment.

You’ll be comfortable working alongside engineers, contractors and technical specialists, with a good practical understanding of engineering safety, maintenance, risk management and Safe Systems of Work.

We’re looking for someone who communicates clearly, works collaboratively and is comfortable taking ownership of day‑to‑day technical activities while recognising when an issue needs to be escalated.

A relevant engineering qualification or equivalent technical knowledge and experience is required.

Desirable

Experience within data centres, CNI, critical facilities, utilities, energy, telecommunications, defence or another mission‑critical environment would be beneficial.

Experience of commissioning, Integrated Systems Testing, mobilisation or operational readiness within a new or significantly upgraded critical facility would be particularly valuable.

Knowledge of critical infrastructure such as HV/LV electrical distribution, UPS, standby generation, cooling systems and BMS/controls would also be advantageous, along with experience of Authorised Person arrangements, switching, isolations or permit‑controlled activities.

What’s in it for you?

This is an opportunity to join a new critical facility before it becomes fully operational, giving you the chance to understand the infrastructure from commissioning onwards and play an important part in shaping how it will ultimately be operated and maintained.

You’ll gain valuable experience across commissioning, IST, mobilisation, operational readiness and critical‑facility operations, while continuing to develop your technical and leadership capability within Mitie’s CNI environment.

If you have strong engineering experience but don’t meet every desirable criterion, we’d still encourage you to apply.

Our market‑leading offering provides you with benefits that suit your lifestyle.

We have a virtual GP on hand for you and members of your household. So you can get expert advice by video or phone without having to leave your home. We offer financial wellbeing assistance through our Salary Finance scheme. For example, you could access 50% of your earned pay before payday for a small fee. Salary Finance also offers competitive loans.

When you join us, we’ll give you a link to our flexible lifestyle benefits platform, Choices. You might choose to purchase up to five extra days’ holiday each year. You might buy critical illness insurance, seek dental treatment or buy technology products at an affordable cost. There are many choices!

We give you access to high street discounts from thousands of well‑known retailers, gyms and more through our MiDeals platform. And we have a cycle‑to‑work scheme. Life cover of up to four times your salary is available. We also offer enhanced pension contributions, a save‑as‑you‑earn scheme, and a Mitie Matching Share Plan (you could even be awarded free shares in Mitie).

We award our employees with Mitie Stars as recognition for their hard work. There are cash prizes up for grabs each month and at the end of the year there’s a chance to scoop a top prize of £10,000!

Our success is a direct result of the experience and quality of our people. Progressing your career is therefore a top priority for us. We offer a diverse variety of training and development avenues via a wide selection of learning resources to suit you.

Since 1987, Mitie’s 84,000 employees have been maintaining companies globally. We are the UK’s leading facilities management and professional services company, and our clients range from household names in banking, critical government sites as well as hospitals and schools.

Join our Mitie Team.

Together our diversity makes us stronger.

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