Stephen M. Redding has joined Sparks, Md.-based KCI Technologies Inc. as vice president and regional practice leader, following its May 29 purchase of Redding Linden Burr (RLB), a Houston mechanical-electrical-plumbing and energy services engineer. He has been that firm’s president.

Louisiana Tech University, Ruston, named Hisham E. Hegab dean of the College of Engineering and Science, effective July 1. Formerly interim dean and professor of mechanical, nanosystems and cyber engineering, he replaces Stan Napper who now is a university vice president. The college is completing a 60,000-sq-ft expansion.

Aegion Corp., the Chesterfield, Mo., water infrastructure supplier, has named five-year board member Charles R. “Chuck” Gordon as interim CEO. He replaces J. Joseph Burgess who resigned on May 3 for undisclosed personal reasons. Aegion (NASDAQ: AEGN), which owns trenchless pipeline technology firm Insituform and contractor Brinderson, has launched a formal search for a permanent CEO. Gordon, who was CEO of water infrastructure firm Natural Systems Utilities LLC since February, will remain on its board. Aegion reported a first-quarter profit of $4.4 million, up 32.7% compared to fourth quarter 2013. Revenue surged 36% to $306.2 million.

Brian P. MacDonald, president and CEO of Philadelphia-based oil giant Sunoco, has joined Hertz Equipment Rental Corp. in the same capacity. He succeeds Lois I. Boyd who led the company since 2011. She continues as an advisor. Two-thirds of the firm’s business is in the industrial and oil & gas sectors.

Lynn Richards, former policy director of the U.S. Environmental Protection Agency’s Office of Sustainable Communities, takes over on July 1 as president and CEO of the Congress for the New Urbanism. The 3,000-member Chicago nonprofit advocates sustainable urban development. She succeeds John O. Norquist, the former mayor of Milwaukee who was in the role since 2004.

Robert Ellis, president and CEO of Yaggy Colby Associates, a Rochester, Minn., landscape architect-engineer, has joined Short Elliott Hendrickson (SEH), a St. Paul design firm, as regional operations manager. The new role follows SEH’s June 2 acquisition of Yaggy Colby. About 80 new employees join SEH, which ranks at No. 143 on ENR’s list of The top 500 Design Firms.

HDR Inc. named Tom Waldron vice president and global transit market sector director, based in New York City. He was senior vice president of AECOM and Americas transit-rail director.

David Rogers, former 25-year design director at Jerde Partnership, Venice, Calif., has joined Perkowitz + Ruth Architects, Long Beach, Calif., as design principal. Perkowitz + Ruth ranks at No. 433 on ENR’s list of The Top 500 Design Firms, with $23.9 million in revenue last year.

Sofia Berger has been promoted to vice president in charge of Latin American and Caribbean operations at Morristown, N.J.-based design firm Louis Berger, effective on July 1. She succeeds Carlos Marcenaro, who the company says will have new duties, which were not disclosed. Berger is a former management consultant at McKinsey & Co. and project manager at Perini Corp. (now Tutor-Perini). Berger also is the granddaughter of Louis Berger, who founded the now $1-billion firm 60 years ago.

Fluor Corp. on May 20 named Carol Johnson president and CEO of Savannah River Nuclear Solutions LLC. a company-led consortium that oversees the management and operating contract for the U.S. Energy Dept.’s Savannah River Site near Aiken, S.C. She retired last year as  president and project manager of Washington Closure Hanford LLC, a consortium of Bechtel, URS Corp. and CH2M Hill that manages cleanup of the 220-sq-mile Columbia River corridor at DOE’s Hanford nuclear waste site in Washington state. A 30-year veteran of nuclear cleanup management in the U.S. and U.K., Johnson will replace this month Dwayne Wilson, who has been in the role since 2011. He said he will take another Fluor position but did not disclose specifics.

Dennis Finn will join Australian professional services firm WorleyParsons Group in September as CEO of its new global advisory business, based in London. He now is vice chairman and global human capital leader at consultant PricewaterhouseCoopers.

Steven D. “Steve” Thorne was elected in May as president of ASFE/The Geoprofessional Business Association, whose member firms provide geotechnical, environmental and construction-materials engineering services. A principal at consultant Terracon, he also is a senior geotechnical engineer and manager of its New Jersey office.