The Eveleigh Chief Mechanical Engineers office is a heritage-listed former engineer's office and now unused building located at Main Suburban railway line in the inner western Sydney suburb of Redfern in the City of Sydney local government area of New South Wales, Australia. The building fronts 505 Wilson Street, opposite Shepherds Lane, Eveleigh. It was built in 1887. It is also known as Eveleigh Chief Mechanical Engineers office and movable relics and Sydney Technology Park. The property is owned by RailCorp, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 2 April 1999.