Avnet Technology Solutions, an $8.1 million unit of Avnet, named Cookie Serrano vice president of finance. She replaces Steve Chlupsa, who has moved to a position with Avnet Technology Solutions' global finance team. Serrano, 43, will oversee the unit's finance teams in the U.S. and Canada. She most recently was vice president of finance at Goodrich and earlier worked in finance and accounting at Motorola and U.S. Foodservice Corp.

John Kuhlow was promoted to controller and vice president at J.B. Hunt Transport Services, a $3.7 billion Arkansas-based transportation services company. As controller, he succeeds Don Cope, who is retiring at the end of October. Kuhlow, 40, joined the company in 2006 as assistant corporate controller from KPMG, where he was a senior manager in the audit department.

Covanta, a $1.6 billion renewable energy company in Morristown, N.J., named Alan Katz vice president of investor relations. He replaces Marisa Jacobs, who is leaving to pursue another opportunity. Katz previously worked in investor relations at WNS Holdings and Hertz Global Holdings. Earlier, he was a co-founder of the investor relations practice at CJP Communications.