Mechanical & Electrical Principal Engineer

Job Description

Our goal at CityFibre is to unlock the digital potential of Britain by creating a broadband network that works seamlessly for everyone, every day. Powerful, gigabit-speed connections that enable people across entire communities to enjoy life in full flow. To do this, we make sure that our people’s voices are heard, their ideas are welcomed, and everyone is given the opportunity to make a real impact.

We encourage change, have a challenger mindset, foster innovation and nurture a welcoming, inclusive and supportive community. In this environment we allow you to bring your best-self to work every day, helping you to achieve your goals, grow your career and reach your full potential.

We’re a Times Top 50 Employer for Women; are endorsed by WORK180; have pledged our commitment to the Armed Forces Covenant; and are a Disability Confident Employer. Working together with our Employee Networks, we’re committed to changing the industry for everyone. 

What you can expect from us

Everyone at CityFibre has an important part to play, and we reflect that in our benefits. With a competitive salary depending on experience, when you join us, you’ll also enjoy 25 days’ holiday, a day off on your birthday, a day off to support a charity or organisation of your choice, a performance-related bonus scheme, and private healthcare.

We believe we deliver our best when we work together. It’s the way we do things, trusting and giving our people the autonomy to manage their own day-to-day, promoting wellbeing, whilst still prioritising time together with our colleagues to connect, collaborate and share our ideas.

How you’ll change it up

You’ll be responsible for developing and delivering the CityFibre M&E technical portfolio including Fibre Exchange (FEx), Fibre Active Cabinet (FAC) and third-party datacentre and collocation spaces. There will be a focus on design, vendor management, financial modelling, facility management and project management. Day to day, this is what you can expect to be doing:

  • Carrying out architecture design feasibility and cost studies
  • Defining the M&E FEx and FAC lifecycle
  • Working with the passive architecture team to optimise CityFibre assets
  • Defining the strategy around the monitoring of our technical portfolio
  • Managing key vendor relationships on a strategic basis, and running major procurement contracts

What you’ll bring to the role

You’ll have excellent Mechanical and Electrical datacentre design and operation experience, as well as strong business case and financial modelling experience. You’ll also need knowledge of the following technologies:

  • AC Electrical Plant
  • DC Electrical Plant
  • UPS and back-up power
  • Fire detection and suppression
  • IT air conditioning
  • Asset security, alarms and access control

We’re looking for people who don’t settle for ‘good enough’ and push things forward. If you’ve just found yourself thinking, ‘I’d love to do this’, we want to hear from you. Let’s change it up.

Diversity, Inclusion and Belonging

Our people have a wide range of experiences and perspectives – and it’s this diversity of thought that makes us who we are.

CityFibre is working hard to change up the telecoms industry. This means we’re committed to providing equal opportunities to people from all backgrounds and commitments, including your carer and family status, ethnicity, sexual orientation, religion, age, disability, gender and gender identity. We’re also offering training programmes and placement opportunities to support the skilled, career changers, service-leavers, and returning workers to become part of our teams.


Additional Information

If there’s any additional support or adjustment you require in the application process to help you achieve your best, please get in touch by emailing We’re here to support you in changing up your career.