Leo Quinn, who began his career in 1979 as a civil engineer at now-struggling U.K. construction services giant Balfour Beatty, will return to the firm as CEO in January. The global contractor announced his appointment on Oct. 15, five months after the departure of Andrew McNaughton. Quinn, who will replace Executive Chairman Steve Marshall in the CEO role, joins the contractor after five profit warnings in the past two years and some analyst speculation over whether, before the leadership change is effective, company stockholders should approve its sale of Parsons Brinckerhoff to Montreal-based giant WSP Global. That deal, announced in early September, is set for a shareholder vote on Oct. 28. In its latest profit warning on Sept. 29, Balfour Beatty also said it had hired consultant KPMG to do a review by year-end of its U.K. construction contracts. Quinn was group CEO of QinetiQ Group plc, a $2.5-billion U.K. defense and security contractor that he is credited with turning around, since 2008."The building blocks are there to give Balfour Beatty's people the success they deserve, and I am keen to work with them to create something significant and lasting," Quinn said.

Walter M. Sanders has been elevated to president of Day & Zimmermann NPS, the power maintenance contracting unit of Philadelphia-based Day & Zimmermann Group Inc. He joined the firm in 2011 as senior vice president of operations, from a previous role as senior vice president for power construction operations at The Shaw Group Inc.

Peoria, Ill., equipment giant Caterpillar said on Oct. 10 that Stuart L. Levenick, group president for customer and dealer support, and Steven H. Wunning, group president for resource industries, will retire in early 2015. Ed Rapp, group president of construction industries, will replace Wunning, who has led Cat logistics and product support while overseeing the 2011 acquisition of Bucyrus International. Tom Pellette, Caterpillar vice president and Solar Turbines Inc. president, will replace Rapp, who is credited with reinvigorating the company's construction business. Rob Charter, vice president of the excavation division, will replace Levenick, who led Cat's dealer transformation initiative and its purchase of Shin Caterpillar Mitsubishi, a former joint venture in Japan.

James E. "Jamie" Frankel has joined Chicago-based law firm Schiff Hardin as a partner in its New York City construction practice. He was a senior partner in the construction group at Arent Fox LLP. Frankel also is a former general counsel for the New York chapter of the American Institute of Architects and an assistant attorney general for the state. Schiff Hardin merged the construction-focused practice of Mazur, Carp & Rubin into the firm in 2013.