The 32-year-old was a youth footballer at Chelsea and was on the books of then League Two Dagenham & Redbridge before committing to sprinting, making the Team GB squad for the Olympic Games in his hometown at London 2012.
Confirming his new role, Gemili told Sky Sports: “Knowledge is power and if I can teach these kids everything I know, I can die happy.
“I hope that only one or two of them can feel some kind of inspiration from my story, because football is a very hard sport; I never planned to become an athlete.
“A lot of these guys won’t make it to the top level, they won’t make it to the top of the Premier League.
“But if I can teach them the skills I have, one or two of them might even go into athletics, you never really know.”
Gemili narrowly missed out on more medals, finishing fourth in the 200 meters at the 2016 Rio Olympics, just 0.003 seconds off bronze, before another fourth place finish at the 2019 Doha World Athletics Championships.
Along with Zharnel Hughes and Ntaneel Mitchell-Blake, he is one of three British male sprinters to have run under 10 seconds in the 100 meters and 20 seconds in the 200 metres, with personal bests of 9.97 seconds and 19.97 seconds respectively.