The company now has regional subsidiaries in the United Kingdom, North America, Scandinavia, and Australasia, with offices in several major cities globally.

SNC-Lavalin Rail & Transit offers a comprehensive range of services across the railway system, including rolling stock, infrastructure, signalling, communications, testing, and software development.

[2] Having opted to pursue international clients, Interfleet established a series of regional offices for the purpose of supporting the individual needs of local markets, providing their services as consultants and subject experts.

[3] By April 2011, Interfleet had expanded considerably, totaling 22 offices spread across the globe, and was reportedly generating a turnover in excess of £50 million.

In conjunction with this rebranding, it was also integrated with other entities, including SNC-Lavalin's Transit Engineers in Vancouver and Toronto along with the Transport Systems team in Montreal; these became a single organisation that operated under the new brand.

SNC-Lavalin Rail & Transit provides services across the railway system, the major elements of which include rolling stock, infrastructure, signalling, communications, testing, and software development.

[13] During September 2010, Interfleet was appointed to perform technical and safety analysis in support of the design of envisioned high speed railways being planned in Norway.