Hartwig Grevener

SwissHoldings operates as a business federation representing the interests of Swiss based multinational enterprises from the manufacturing and service sectors. The company is headquartered in Bern, Switzerland.

Gate Gourmet Switzerland GmbH provides international airline catering services. It clients include international carriers such as American Airlines, Aeromexico, British Airways, Continental Airlines, Delta Air Lines, Emirates, Iberia, LTU, Northwest, SAS, Qantas, Sterling, Swiss, Thai and Turkish Airlines and the airports of Heathrow and O'Hare, among others. The company was founded in 1992 and is headquartered in Balsberg, Switzerland.

Jet Aviation International, Inc. provides chartered jets and aircraft. It also provides aircraft management, charter support services, and flight support. The company was founded in 1991 and is headquartered in West Palm Beach, FL.

Jet Aviation Management AG provides maintenance and engineering services for the aviation industry. The firm offers completions & engineering services, fixed base operations, aircraft sales, charter services, airline handling including passenger and aviation staffing services. The company was founded in 1967 and is headquartered in Zurich, Switzerland.