Stevenin served three times as member of the Search and Rescue Team in Kazakhstan for the spacecraft landing of European astronauts.

He led the Eurocom Team from 2007 to 2012 and served in 2012 as CAPCOM and support diver of the 16th NASA Extreme Environment Mission Operations (NEEMO 16).

[13] In September 2013, Stevenin and ESA astronaut Jean-François Clervoy slipped into the roles of Neil Armstrong and Buzz Aldrin for an underwater simulation test of Apollo 11 moonwalk tasks, organised by the Compagnie maritime d'expertises (COMEX) off the coast of Marseilles, France.

[14][15][16][17][18][19][20][21][22][23][24][25] They tested a COMEX-designed prototype training-spacesuit based on the Orlan adapted to simulate Moon gravity.

He has a private pilot licence (EASA Part-FCL) and was certified in France for aerobatics flights in positive G. He has skydiving experience and has logged 60 parachuting jumps.