Leadership Team

Barbara Thayer, PE, RA, LEED AP

Founder & President
Ms. Thayer has established a multi-disciplined firm that combines architecture, engineering, survey and landscape architecture; providing clients with the benefits of an integrated design approach. Ms. Thayer founded B. Thayer Associates in 1990 and has over 30 years of experience as a licensed architect and engineer. As Principal-in-Charge on nearly all of the firm’s architectural and engineering projects, Ms. Thayer maintains regular contact with direct staff concerning on-going project operations, production of deliverable drawing & design plans, reviews and the approval of all cost data prior to client submission. She continues to provide strategic direction for overall company initiatives.
B. Thayer Associates Management Team’s talents compliment Ms. Thayer’s leadership and perpetuate her vision.

John R. McWilliams, LS

Vice President, Land Surveying

Mr. McWilliams is a New York State licensed land surveyor with 30+ years of experience. His career highlights are the management of right-of-way and acquisition mapping; high precision control surveys, and boundary, utility, topographic, and design surveys for public and private clients.

Mr. McWilliams’ experience includes providing surveying construction support services for large commercial projects as well as for smaller community projects in addition to completing topographic and utility surveys for major roadway and sewer improvements throughout New York City and Long Island.

Kevin C. Papasian, PE

Vice President, Engineering
Mr. Papasian has extensive management and engineering experience on various projects for municipalities, state agencies, and private clients.
He has worked on and managed transportation projects, including roadway, and traffic, waterfront resilience projects, water and wastewater projects, petroleum industry projects, site development projects, utility projects, and various construction projects.
Mr. Papasian has past experience with the SCDPW, NYSDOT, NCDPW, various towns, many fortune 500 companies, and developers throughout Long Island and the Tri-State region.
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