Delivery Partner of Choice

Signalling & Telecoms 

We have one of the widest signalling offerings in the industry from GRIP 1-8 Design through to Installation and Testing.

Electrification & Plant

With resources situated nationwide, OSL offer design, engineering and delivery expertise across all electrification activities.

Rail & Track

We offer specialist services for switches and crossings, permanent way, on-track plant, safety, consultancy, quality and assurance.

Training & Consultancy

We understand the need for a highly skilled and competent workforce. OSL deliver a wide range of training services, including IRSE and Mod 5.


Committed to delivering excellence in every aspect of rail design and engineering.

OSL have rapidly established themselves as one of the leading independent signalling design and testing companies. We can design, install, test and commission to your requirements. Our project teams are experienced in a wide range of railway disciplines, and have the skills and knowledge to anticipate the needs of a smart railway.

We are one of the only companies to support the major Tier 1 manufacturers with the production of the interlocking data designs and one of the few companies in the country to still offer a full Solid State Interlocking (SSI) capability.


Work with us

High quality recruitment is at the heart of everything we do. Join our team, and enjoy a dynamic and inclusive culture focused on professional development and continuous improvement.


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Head Office
Unit 11, Wistaston Business Centre, Wistaston Rd, Crewe CW2 7RP