Environmental, facilities, geotechnical and materials services firm Terracon has named Don Dracon senior vice president of client development. Dracon, who has more than 30 years of experience, will be responsible for business and client strategy, national accounts and national business sector oversight.

Choate Construction Co. in Atlanta has appointed Dave Knudson as COO. He formerly worked as executive vice president of operations. He has more than 35 years of experience in the industry, including 20 at Choate.

Georgia-based consulting, planning and engineering design firm Thomas & Hutton has made a series of promotions as part of an organizational focus on strategic growth and efficiency in 10 regions. Trent Thompson has been promoted to vice president of infrastructure. Jason Chambless has been named vice president of coastal civil/site development, overseeing civil departments. Kevin Shoemake has been named vice president of inland civil/site development. Ryan Page was promoted to Greenville, S.C., civil department manager.

Engineering, planning and consulting firm Freese and Nichols has hired Jim Kilnoski as program manager for the firm’s work as part of the Advancing Resilience in Communities Joint Venture, supporting FEMA’s efforts to reduce flood risk for the East Coast and Great Lakes regions.

Architecture, planning and interior design firm Zysovich has hired Roberto Smith, who will serve as director of health care design for the firm in Miami, leading Zysovich’s expansion into the health care market sector.

Architecture and engineering firm Goodwyn Mills Cawood has hired Matt Mitchell as vice president of landscape architecture in the firm’s Atlanta office. Kalanos Johnson joins the firm as a senior planner in the Augusta, Ga., office.

Coastal Construction Group has promoted three executives, each an industry veteran currently overseeing high-profile projects for the firm in South Florida. Nick Duke has been appointed vice president of field operations. Blake Murphy has been appointed vice president of field operations. Jon Piccolo has been promoted to vice president.

Caddell Construction has promoted both Jason Carnes and Zach Moore to the position of vice president – commercial.

Fort Lauderdale, Fla.-based commercial real estate firm Stiles has announced an expansion into the greater Tampa market and promoted Austin Freedman to director of retail and commerce development for the west coast of Florida.

Architecture, engineering and consulting firm RS&H has named Linnea Brudenell as vice president, national sustainability and resilience director, working with leadership on strategies to integrate sustainability and resilience.

Sto Corp., an Atlanta-based building materials designer and producer, has named Mark Orlando as vice president of sales. Claudia Mueller has been named director of marketing communications.