CSL Consulting Expands Presence in the Southeastern U.S.; Announces Strategic Partnership with Brownstone Construction Group

CSL Consulting LLC announced a major expansion into the Southeastern United States through its acquisition of Brownstone Construction Group LLC. Terms of the transaction were not disclosed. The acquisition enhances CSL’s delivery capabilities in owner’s representation, program management, and construction oversight in a fast-growing region.

Founded in 2005 by Dale Collier and Darrell Campbell and headquartered in Columbia, South Carolina, Brownstone is a respected owner’s representative and project management firm. It specializes in managing complex capital improvement projects — especially in public K-12 education, higher education, healthcare, municipal, and civil infrastructure sectors — from planning and design through construction and closeout. The firm serves clients throughout North Carolina, South Carolina, Georgia, and the broader Southeast with offices in Charleston, Savannah, Charlotte and Greensboro.

“From the beginning, Brownstone was built on the foundation of empowering exceptional talent and delivering sustained value for clients and communities,” said Dale Collier, Co-Founder of Brownstone. “Joining forces with CSL puts us in an excellent position to broaden our impact, deepen our technological and operational capabilities, and tackle larger, more complex projects.”

Darrell Campbell, Co-Founder of Brownstone, added: “We see CSL as a partner who shares our passion for quality, culture, and long-term client relationships. Together we will preserve what makes Brownstone unique while accelerating growth and expanding service delivery across the Southeastern U.S.”

Marc Cammarota and Ed LeFlore, Co-Founders and Principals of CSL Consulting, commented: “The addition of Brownstone marks a major milestone in CSL’s growth journey. Their strong reputation in the public education, municipal, and civil infrastructure sectors complements our own strengths. This acquisition enhances our capacity to serve clients in the Southeast, particularly in the education and healthcare sectors, while maintaining our commitment to delivering projects on time, within budget, and with excellence.”