American Express GBT (GBT) has appointed Rachel Tonge as UK vice president and general manager. In her new role, according to an announcement, she will lead the return of business travel in the UK by overseeing GBT’s business operations and strengthening customer relationships. Tonge has been with GBT for five years, most recently as director of strategic transformation, including a key role in the acquisition and integration of Egencia. She has worked across multiple industries, including travel, energy and international development.

JetBlue has promoted Dave Clark to head of revenue and planning; and Lisa Studness Reifer to head of finance and treasury. Clark had served as the airline’s vice president of sales and revenue management since February 2017. Prior to joining JetBlue in 2009, he worked in the Boston Consulting Group’s travel and tourism practice. Reifer has been with the carrier for almost 18 years, serving in various executive roles. Prior to joining the airline, she had been an associate with the law firm Shearman & Sterling.

Alaska Airlines named Neil Thwaites as regional vice president for California. He joins the airline from TripArc, where he was vice president of air procurement in charge of airline supplier strategy and negotiations. Before that, he was at British Airways for a decade, holding various positions in sales and operations.

Synergy Global Housing, a serviced accommodation management company, has named Michelle Low as vice president of global supply chain, based out of the company’s Singapore office. She began her career in hospitality at the Shangri-La Hotels and Resorts in Singapore as sales manager. She later held sales management titles at Westin and Conrad Hotels and Resorts before transitioning to corporate housing and global mobility with senior leadership roles at Oakwood and Cactus. Most recently, she was responsible for setting global strategic direction in sales and revenue distribution at the corporate level for Oakwood.