Langsam Property Services Corp. is a Bronx-based real estate management company. The company is responsible for managing the day-to-day operation of approximately 350 buildings containing over 11,000 dwelling units and 300 commercial units. These buildings are located in the Bronx, Manhattan, Queens, Brooklyn, and lower Westchester County.

When Mark Engel joined the organization in the mid 1970s, it managed 2,500 housing units. Langsam is designated as an Accredited Management Organization (AMO), a standard of excellence in management conferred by the Chicago-based, Institute of Real Estate Management (IREM). Langsam is one of only two AMO's in all of New York State which has four Certified Property Managers directing its property management teams.

All of Langsam's managing agents are either Licensed Associate Real Estate Brokers or Sales Associates. Several are experienced in construction and design. Other professional staff have almost fifty years combined property management and support experience. Its Director of Operations holds a CPM designation and other staff hold advanced degrees in public finance and urban planning. Staff also have held high level positions in New York City government

Langsam Property Services does not discriminate based on race, color, religion, national origin, sex, disability, familial status (minor children under the age of 18), age, sexual orientation, marital status, military status, lawful source of income (including housing voucher programs), gender identity or expression, arrest records, veteran status, and domestic violence victim status.