Dewberry, an engineer-architect based in Fairfax, Va., has named Donald E. Stone Jr. as its new CEO. He had been chief operating officer and infrastructure engineering services practice-area leader. Additionally, Dan M. Pleasant, president of Dewberry’s Southeast division, has been promoted to replace him.
Environmental engineer Tetra Tech, Pasadena, Calif., has appointed Daniel L. Johnson as vice president, based in its Golden, Colo., office. He is previously vice president and principal with GEI Consultants.