Christopher Seamster has been promoted to the position of regional manager at McKim & Creed, Raleigh. In this role, he will lead the office's planning and land development services. Prior to this promotion, Seamster served as a landscape architect and project manager during his 13 years with the firm.

David B. Thomas was named director of strategic initiatives for Gannett Fleming, Miami. A 40-year industry veteran, Thomas first joined the firm five years ago as national director of transit and rail. In this new role, Thomas is responsible for developing programs to drive growth, client diversity and operational excellence. He now also chairs Gannett Fleming's acquisition committee, which identifies opportunities for growth through acquisition. Thomas is a senior vice president and a member of the board of directors.

Beth Muter has been promoted to majority owner and chief executive officer for Muter Construction, a general contractor based in Zebulon, N.C. Muter joined the company in 2013 as chief financial officer. The commercial contracting and construction-management firm was founded in 2012 by John D. Muter. The company is certified as a woman-owned business by the state of North Carolina.

Parsons Brinckerhoff named Scot Sibert as a senior principal technical specialist in the firm's Charlotte office. In this position, Sibert is responsible for managing transit and rail planning projects throughout North Carolina. His experience includes work related to transportation, land-use and bicycle/pedestrian planning. Prior to joining PB, Sibert worked as a planning manager with an international engineering firm.

The firm also named Steven Jarrett to the position of structural department manager for its Atlanta office. Jarrett has more than 30 years of transportation-related experience, including 15 years in a previous stint with PB. He will lead the firm's structural engineering operations throughout the state of Georgia.

In its Orlando office, PB hired Charles Hymes as a senior technical manager. In this role, he will manage and provide technical support for transit and rail projects across the country. Hymes, who has more than 30 years of infrastructure-related engineering experience, previously worked as a program director for another consulting firm.

Tim Taylor is heading up the newly created in-house mechanical engineering services department for Primus Design Services, a division of Woodstock, Ga.-based design-builder Primus. Taylor has more than 30 years of related design experience, having provided implementation planning, scheduling, estimating, cost control and client reporting in the light industrial, process and commercial development sectors.

Jimmy Mitchell was promoted to business development manager for Skanska's Atlanta office, where he will focus on Georgia projects. A 12-year industry veteran, Mitchell most recently served as a senior mechanical estimator in preconstruction for Skanska. A leader in local sustainability efforts, Mitchell is a co-founder of the Lifecycle Building Center, an Atlanta-based nonprofit that supports the reuse of construction materials.

Ecologist Kristin Jenkins has joined Stantec's Tampa office as senior scientist and statistical programmer in the engineering firm's environmental services group. Jenkins has 13 years of experience providing environmental services and data management and analysis for the power, oil and gas industries.

In its Raleigh office, the firm named Larry Ragland and Dennis Pitts as principals. Both Ragland and Pitts have more than 40 years of landscape architecture experience.

In its Fort Myers, Fla., office, Stantec added John Thompson as a senior project manager in the environmental services group. Also, Josh Philpot was named a senior planner.

Amicon Construction, a Miami-based commercial interiors contractor, named Adam Mueller a partner. Mueller serves as Amicon's vice president of construction.

Larry Amboy, a 40-year construction industry veteran, has joined DPR Construction, Tampa, as a scheduler for the Florida region. Amboy previously worked for 15 years in DPR's San Diego office.