Grumman / Butkus Associates, LTD.

Grumman / Butkus Associates, LTD., doing business as Grumman Butkus Associates LIMITED, operates exclusively as a subcontractor delivering mechanical, electrical, and plumbing (MEP) engineering and design support to federal building and infrastructure clients through a single prime relationship with Wiss, Janney, Elstner Associates, Inc.

The vendor's recent federal footprint comprises three sub-awards totaling $93 thousand, all under the GSA Region 5 Supplemental Architect and Engineering Services IDIQ (2020–2025). Work has been distributed evenly across three consecutive years: a December 2021 sub task delivering MEP engineering for domestic water system documentation at the AJC Federal Building in Cleveland, Ohio (Social Security Administration funding); an August 2022 sub task providing MEP engineering for a feasibility study of the Paul Finley Federal Building and United States Courthouse in Springfield, Illinois (General Services Administration Public Buildings Service Region 5); and an April 2023 sub task delivering MEP support for a plaza repair design study at 600 West Madison in Chicago, Illinois (GSA Region 5). Customer concentration splits between the General Services Administration Public Buildings Service Region 5 (two awards) and the Social Security Administration (one award), with 100% of awards operating under the GSA Region 5 A&E IDIQ. All three awards fall under the Architectural Services NAICS category. The vendor operates as a pure subcontractor with no prime contract footprint or independent vehicle seats.