He served as a fighter pilot in the Swiss Air Force, where he flew Dassault Mirage IIIs, Northrop F-5 Tiger IIs, and Hawker Hunters.

[3] In December 2006 (in Bex, Switzerland) Rossy became the first to successfully fly horizontally for six minutes using four jet engines and wings strapped on his back.

[7] On 26 September 2008, jumping from a Pilatus Porter at an altitude of 2,500 metres (8,200 ft) over Calais, France, Rossy crossed the English Channel with a single jet-powered wing strapped on his back, wearing only a helmet and a flight suit for protection.

Reaching speeds of up to 190 kilometres per hour (120 mph), he made the 35 km (22 mi; 19 nmi) flight to England in 13 minutes, where he deployed his parachute and landed in Dover becoming the first person to cross the Channel in this manner.

[8] In November 2009 Rossy attempted a crossing of the Strait of Gibraltar, hoping to be the first person to fly between two continents using a "Jet pack".

Strong winds and cloud banks forced Rossy to ditch into the sea just 4.8 km; 2.6 nmi (3 miles) from the Spanish coast, where his support helicopter picked him up ten minutes later, unhurt.

[9][10] On 5 November 2010 Rossy flew a new version of his jet-powered flight system and successfully performed two aerial loops before landing via parachute.

[24] VTOL and transition to horizontal flight was demonstrated in February of 2020 with Vince Reffet piloting the Rossy-type Jetpack on behalf of Jetman Dubai.