The company was founded in 1979, and provides planning and design services to create convention centers, cultural arts venues, higher education facilities, commercial and mixed-use developments.

[2] In 2005, LMN Partners included: John Nesholm, Chris Eseman, Walt Niehoff, Mark Reddington, Rob Widmeyer, and George Shaw; by 2008, Wendy Pautz had joined.

By 2015, the partners had become: Shaw, Reddington, Widmeyer, Niehoff, Pautz, John Chau, Rafael Viñoly-Menendez, Sam Miller, and Stephen Van Dyck.

[2] As of March 2021, the partners consisted of Chau, Miller, Niehoff, Reddington, Shaw, Van Dyck, Viñoly-Menendez, Julie Adams, Osama Quotah, and Pamela Trevithick.

Most recently, LMN's work on the Vancouver Convention Centre West was awarded Sustainable Building of the Year from World Architecture News.