Trinity Consultants acquires Longman Lindsey

30 November 2023 2 min. read

Trinity Consultants, a Dallas-headquartered environmental consulting firm, has acquired Longman Lindsey, a New York-based acoustical consulting firm.

Founded in 2013, Longman Lindsey advises design firms on acoustical aspects of buildings. The firm offers consulting services across architectural acoustics, room acoustics, modeling, sound masking, environmental noise control, product verification, and troubleshooting.

Longman Lindsey has 19 team members, according to its website.

As part of the transaction, the Longman Lindsey team – including president and founder John Longman – will join Trinity’s built environment division.

The deal builds on Trinity’s 2022 acquisition of acoustical consultancy Cerami.Trinity Consultants acquires Longman Lindsey“Longman Lindsey’s esteemed reputation, combined with their seasoned team, commitment to project excellence, and synergistic organizational structure will drive a competitive edge for Trinity's Built Environment division,” said Jim Perry, managing director of Cerami. “We're excited to partner with John and his team to create lasting value for our clients and partners around the world."

AEC Advisors, an M&A and corporate finance consultancy specializing in the architecture, engineering, and construction sector, advised Longman Lindsey on the transaction.

"We are pleased to join forces with a global natural and built environmental consulting firm and premier acoustic design and technology consultancy that will build on and extend our ability to serve clients and their projects," Longman said. "This partnership allows us to amplify our strengths and expand our market reach in groundbreaking ways."

Trinity earlier this autumn acquired Waid Environmental, an Austin-based engineering and environmental services firm.

Trinity is a portfolio company of Oak Hill Partners, which acquired it in 2021. The consultancy has more than 1,000 professionals globally delivering EHS, engineering, and scientific-focused consulting, technology, training, and staffing services to clients in the industrial, energy, manufacturing, mining, life sciences, and commercial/institutional sectors.