IP Group is a multi-disciplined, professional engineering company that offers design services for mechanical, electrical, plumbing, and fire safety systems.

Senior principals Leslie Kahn, P.E. and Ivan Pollak, P.E. have over half a century of combined experience. Leslie Kahn has been practicing since 1962 and Ivan Pollak since 1976. The Principals both teach environmental technologies at the renowned Parsons School of Architecture at New School University and are regularly invited to share their expertise at speaking engagements. Associate Ed Barsky brings to the firm over a decade of project management and engineering experience. Our staff comes from around the world, creating a diverse cultural environment full of wisdom gathered from four different continents and many different backgrounds.

IP Group serves both public and private clients, working closely with some of the nation’s premier design-oriented architects. IP Group provides engineering services for a broad variety of building types, both new construction and renovation projects. The firm conducts condition and feasibility studies and offers consulting services for dispute resolution regarding building system engineering. IP Group provides engineering services for historic preservation projects and sustainable design projects. Most importantly IP Group’s system designs are efficient, comfortable, and safe for occupants.  

We understand the cooperation necessary between architects, engineers, contractors, agencies, utility companies, and owners to orchestrate successful projects. Projects benefit from excellent communication, organization, and attention to detail. With IP Group, information is shared, decisions are documented, budgets are honored, and deadlines are sacred.

Since being established in 1987, IP Group has served an ever-growing client base throughout the northeastern United States.

I. P. Professional Engineering, P. C. is a Professional Corporation registered in the State of New York and doing business as IP Group.

Teamwork is part of any construction project and IP Group is a practiced collaborator.