Members, mainly Landmark Preservationists, participate in surveying and researching potential landmarks and regulating changes to designated landmarks and historic districts in the city.

Chapter 40, the newest of the Guild's chapters, was formed in 2003 to better represent members working in upstate areas, north of New York City.

Members work as chemists carrying out toxicological examination of forensic samples, now including DNA analysis.

Members are involved in the design of new housing projects, renovations on urban renewal projects, and helping tenant associations learn how to manage their buildings in preparation for purchasing them.

Members in the Engineering Project Manager and Surveyor titles perform planning, engineering, design, construction, and maintenance work on the City's streets and bridges.

Members are responsible for design, new construction and rehabilitation of 21 City University of New York community colleges and senior college locations throughout the City.

President: Jeffrey Pemberton

Members design and supervise the construction of storage garages and repair shops, incinerators, landfills, and marine transfer stations. Members are also involved in the design specification and testing of automotive vehicles such as collection trucks and sweepers.

Members enforce New York City air, noise, water, and asbestos codes, lead abatement, and hazardous material codes.

Members undertake technical surveys of shelters and other facilities operated by the Human Resources Administration, inspect construction plans, design new structures and renovations to existing HRA buildings, and perform other technical work on facilities operated by the agency.

Members perform technical work related to traffic flow, street lighting and parking in the City. They operate the Department of Transportation's radio system, monitoring information related to traffic emergencies and conditions throughout the city.