Jaros, Baum & Bolles Consulting Engineers, LLP (JB&B) is an American MEP (Mechanical, electrical, and plumbing) and consulting engineering firm founded in 1915 by Alfred L. Jaros, Jr. and Albert L.

[5] In 2020, JB&B was named New York's Design Firm of the Year by Engineering-News Record magazine.

[6] In 1915, mechanical engineers Alfred L. Jaros, Jr. and Albert L. Baum, recent graduates of Columbia University's engineering program, left their internships with a large consulting firm and founded Jaros and Baum.

[7][8] In February 2022, the firm created the Deep Carbon Reduction Group, which helps building owners and operators navigate new policies and regulations for reducing carbon emissions in urban settings.

[12] Designed and built in conjunction with COOKFOX Architects and AECOM Tishman for Hines Interests Limited Partnership and Hudson Square Properties,[13] the project is intended to meet New York City’s Local Law 97 of 2019, passed as a part of the Climate Mobilization Act by the New York City Council in March 2019.