E To E Transportation Infrastructure Limited, incorporated in 2010, is an ISO 9001:2015 certified company providing system integration and engineering solutions for the railway sector across mainline, urban transit, and private siding projects. The company offers end-to-end services including signaling and telecommunications, overhead electrification, track projects, system integration, private sidings, and engineering design, covering design, procurement, installation, and testing. It has executed projects for Indian Railways, public sector undertakings, private rail sidings, and infrastructure developers, with key works including CBTC signaling for Hyderabad and Nagpur Metro, S&T modernization for Vizag Steel Plant and NUPPL Power Plant, interlocking upgrades on the Hosur–Salem section, siding expansion at Gujarat Pipavav Port, and platform screen door installations for Mumbai Metro Line 3 and Chennai Metro Phase 1. As of June 30, 2025, the company had an order book of 49 ongoing contracts valued at ₹43,964.38 lakh, supported by a workforce of 425 full-time employees as of July 31, 2025.