United Airlines named Robert Rivkin senior vice president and general counsel, responsible for all legal matters, as well as ethics, compliance, government contracting and security. Before joining United, he served as deputy mayor of Chicago. Prior to that, Rivkin was deputy general counsel for Delta Air Lines as well as general counsel for the Department of Transportation.

Christopherson Business Travel has named J.B. Walsh as chief technology officer. He most recently served as vice president of development delivery practices at Amadeus IT Group. And prior to that, he led development teams at Accenture and Navitaire.

Sonesta International Hotels Corporation has appointed Georgia Lobban as senior director, global sales; and Michael Fruin as vice president of operations for Sonesta ES Suites. Lobban has been overseeing global sales efforts for Sonesta on an interim basis. She brings over 20 years of experience in property and B2B sales. Prior to Sonesta, she managed her own firm for 10 years. Fruin has been general manager of several Residence Inns by Marriott, and has led development, planning and feasibility for Marriott extended stay and select service brands. He was also vice president of owner and franchise services for Marriott.