He joined Virgin Atlantic in 1995, flying Boeing 747s as a Captain from 1999; he also flew the Airbus A340 from 2002. He finished his flying career with over 11,000 hours flying.[citation needed]
Virgin Galactic
He joined Virgin Galactic in 2009, and is now the Chief Pilot. The suborbital spacecraft, SpaceShipTwo (SS2), will reach a height of 360,000 feet. On its journey into space, the SS2 spacecraft will reach Mach 3.5. The first SS2 spacecraft to fly, of which he was one of the pilots, was the VSS Enterprise; the second SS2 spacecraft is called VSS Unity. On 22 February 2019 Mackay became the 569th person, and first Scot, to visit space. He piloted the VSS Unity VF-01 flight above 50 mi (80 km), qualifying him as an FAAcommercial astronaut. He has since piloted the Unity 21 and Unity 22 flights, also above 50 mi (80 km).[citation needed]