Hillandale Advises on Transformational Merger
NMS Capital Portfolio Company CSL Consulting Expands in Southeastern U.S.; Announces Partnership with Brownstone Construction Group
Burlington, MA and Columbia, SC, July 14, 2025 – CSL Consulting LLC (“CSL Consulting”), a portfolio company of NMS Capital (“NMS”), announced today that it has further expanded into the Southeastern U.S. with the acquisition of Brownstone Construction Group LLC (“Brownstone” or the “Company”). Terms of the transaction were not disclosed.
Founded in 2005 by Dale Collier and Darrell Campbell and headquartered in Columbia, South Carolina, Brownstone is an owner’s representative and project management services firm that specializes in managing complex capital improvement projects for clients predominantly across the public K‑12 education, higher education, healthcare, municipal, and broader civil end markets. Acting as a trusted advocate for its clients, Brownstone oversees projects from planning and design through construction and closeout, ensuring delivery on time, within budget, and to the required standards. The company currently serves clients throughout North Carolina, South Carolina, Georgia, and the broader Southeastern United States, providing a full suite of services including owner’s representation, program management, project management, and construction management oversight.
Dale Collier, Co-Founder of Brownstone, shared, “When we launched Brownstone, our goal was to create a company that truly empowers the talented professionals delivering projects for our clients. It’s been incredibly rewarding to see how far we’ve come, the exceptional people who’ve joined our team, and the trust we’ve earned from our clients and communities. Now, we’re ready to build on that foundation and take Brownstone to the next level through strategic growth, investments in technology, and expanding opportunities for our people.” Darrell Campbell, Co-Founder of Brownstone, added, “Partnering with CSL and NMS opens up an exciting new chapter for Brownstone. From day one, it was clear that both CSL and NMS share our commitment to quality, culture, and long-term relationships. With their partnership and resources, we’re positioned to broaden our reach, strengthen our capabilities, and continue delivering exceptional project management and owner’s representation services. Together, we’ll be ready to tackle even bigger projects and help meet the critical infrastructure needs across our region—while preserving what makes Brownstone unique.”
Marc Cammarota and Ed LeFlore, Co-Founders and Principals of CSL, commented, “Partnering with Brownstone marks an exciting next step for CSL as we continue to grow our presence in the public K‑12 market, strengthen CSL college and university market share, and deepen our reach across the Southeastern U.S. Brownstone’s strong reputation and proven track record in delivering complex education and municipal projects align perfectly with our vision for expansion and our commitment to exceptional client service.”
Greenberg Traurig provided legal advice to CSL Consulting. Hillandale Advisors served as financial advisor to Brownstone while Adams & Reese provided legal advice.
About CSL Consulting:
Based in Burlington, MA, CSL Consulting is a leading Owner’s Representative, Project Management and Construction Mitigation firm, advising clients to ensure the successful execution of their strategic capital initiatives from concept planning and design to budgeting, construction oversight and project closeout. The Company provides services to a diverse mix of customer end-markets across the Eastern U.S., including higher education, private K-12, corporate, hospitality, healthcare, development, infrastructure, nonprofit and life sciences. CSL is recognized for its regional and end-market specific expertise, tailored project solutions and a proven track record of delivering complex, high-value projects on time and within budget. For more information on all CSL offerings, please visit www.csl-consulting.com.
About Brownstone Construction Group:
Brownstone is a Columbia, SC–based program management and owner’s representation firm serving the Southeastern U.S. The Company partners with public and private clients to deliver complex capital projects in public K‑12 and higher education, healthcare, municipal, and civil sectors. With offices in Columbia, SC, Charleston, SC, Savannah, GA, Charlotte, NC, and Greensboro, NC, Brownstone provides full-service support — from early planning and design to construction oversight — acting as a trusted owner’s rep to keep projects on track, on budget, and aligned with each client’s goals. For more information on all Brownstone offerings, please visit www.bstonegroup.com.
About NMS Capital:
Founded in 2010, NMS Capital is an experienced private equity firm managing assets in excess of $1.5 billion. Since inception, NMS has partnered with management teams in over 150 investments and follow-on acquisitions across defined investment themes within the Business Services and Healthcare Services industries. The firm’s principal strategy is to create long-term value by providing strategic and operational resources to growth-oriented companies led by founders or experienced management teams. NMS has successfully built industry leading lower middle market companies in defensible and scalable end markets by accelerating organic and acquisition-driven growth.
For additional information on NMS, please visit the firm’s website at www.nms-capital.com. Follow NMS Capital on www.linkedin.com/company/nms-capital.
