Balfour Beatty Construction promoted Sean Holliday to vice president and business unit leader of its Northern California office in Oakland.    

Holliday joined the firm as a project manager in 2002 and has overseen the construction of numerous Bay Area projects. Holliday holds a bachelor’s degree in civil engineering from the University of California, Davis.

Balfour Beatty also expanded the role of  Brian Cahill. Formerly the president of the firm’s now-disbanded Southwest division, which included Southern California and the Southwest, he is now president of the new California division, which includes all of California and Arizona. A 30-year construction industry veteran, Cahill began his career with the company in 1993 as a  project superintendent.

BNBuilders hired Melanie Ziemniak as a project manager.  She will work on a new 60,000-sq-ft lab/office building in San Diego for Alexandria Real Estate Equities Inc. Ziemniak has more than 25 years of experience managing complex projects for clients such as Sharp Healthcare, Palomar Pomerado Health, Skyline Hills Branch Library and UCSD. Ziemniak earned her master’s degree in executive leadership from the University of San Diego.

Moffatt & Nichol’s Long Beach office added Jose Avendano as a project manager, specializing in rail and transit. He has more than 25 years of experience in rail, roadway and intermodal transportation. Previously, Avendano served on the program and engineering management team for the California High Speed Rail project. Avendano  obtained his bachelor’s degree in civil engineering from the National Polytechnic Institute in Mexico City.

Parsons promoted Ashay Dalvi to vice president and corporate controller. Based in Pasadena, Dalvi joined Parsons in 2012 as assistant corporate controller following a 12-year career with PwC. He serves as an active member of Parsons’ Leadership Council, a 14-member group that represents all of the business units by developing new ideas and strategies. Dalvi holds a bachelor’s degree in accounting from the University of Southern California.

AECOM added Rick Land as bridge quality practice leader in Sacramento. He will provide quality oversight and coordinate AECOM’s overall North America bridge practice, which includes almost 800 bridge engineers located in 85 offices. Prior to joining AECOM, Land served as chief deputy director of Caltrans.

WSP | Parsons Brinckerhoff named Steve Klein and Steve Dubnewych vice presidents of the firm’s tunneling practice in California. Based in the firm’s Sacramento office, Klein has more than 35 years of tunneling experience on projects throughout the U.S. with construction values ranging from $100 million to more than $5 billion. Klein received a master’s degree in geotechnical engineering from the University of California, Berkeley.

Dubnewych, based in Los Angeles, will lead the company’s Southern California tunneling practice and support projects globally, particularly those related to water conveyance. He has 28 years of tunneling experience. He received a bachelor’s degree in mining engineering from Queen’s University in Ontario, Canada.

Josh Gaffen was promoted to vice president of client development at Gafcon. Since joining the program and construction management firm in 2007, Gaffen has managed the company’s involvement in high-profile projects for multibillion-dollar capital improvement programs at the Los Angeles Community College District and the Los Angeles Unified and San Diego Unified school districts.