
Who are we
First Rail London (FRL) is the train operating company responsible for running the London Overground network under a concession agreement with Transport for London (TfL). The concession began in May 2026.
First Rail London is part of FirstGroup, one of the leading rail operators and one of the largest bus operators in the UK. FirstGroup operates services throughout the UK and Ireland, with over 30,000 employees providing services that make travel smoother and life easier. FirstGroup works hard to reduce its impact on the environment, introducing cleaner and more environmentally responsible methods of transport.
About the job
The Operational Performance & Improvement Manager (OPIM) will lead the development and delivery of performance, people and operational improvement initiatives across the North London Railway (NLR), supporting the Service Delivery Centre (SDC). This role will work alongside the local management team for both First Rail London (FRL) and Network Rail (NR) to drive the completion of multiple continuous improvement projects for the NLR. This will primarily deliver elements of the Mildmay Line Operating Plan.
The role will drive a culture of continuous improvement, collaboration and accountability, embedding sustainable change that delivers improved train performance, enhanced operational reliability and increased customer satisfaction across the Mildmay and Suffragette lines. The role will provide leadership and governance for improvement activity, support local management teams in achieving strategic objectives, and strengthen cross-route collaboration to deliver consistent operational excellence across the network.
This role support delivery across First Rail London (FRL) and Network Rail (NR)
Your main responsibilities will be:
As a minimum, you will need to have:
Essential
Desirable
The Reward
We all belong at First Rail London. FirstGroup's vision is to provide an inclusive environment for all colleagues, across its group of businesses, ensuring all candidates have an equal opportunity to access meaningful employment.
We value our differences such as age, gender, LGBTQIA+, ethnicity, religion, and disability. We maintain a zero tolerance towards any form of prejudice towards our colleagues, customers, and future talent.
We celebrate and encourage diversity of thought, progressive ways of working and seeing all our colleagues grow and thrive.
We review all roles and job descriptions to ensure they are accessible and, where possible, we support and provide flexible working options; we recommend that you refer to each vacancy description for further details.
If you require additional support to complete your application due to a disability or neurodivergent condition, for example, dyslexia, dyspraxia, or autism, please follow the links below. We encourage you to share any additional needs you may require so we can provide a fair and equal process for all who apply.
https://exceptionalindividuals.com/neurodiversity/
https://www.healthassured.org/blog/neurodiversity/
©2026 FirstGroup plc. All Rights Reserved.
We use cookies to personalise content and to analyse our traffic. We may also share information about your use of our site with our analytics partners. You can choose which cookies you are happy to accept and change your preferences at anytime. For more information, please visit our cookies page.
These cookies are required to enable core site functionality.
These cookies allow us to analyse site usage so we can measure and improve performance.