Jérôme has coached more than 100 athletes in achieving their running goals since 2004, many of which have run sub 3 hour marathon. He also coached the Galway City Harriers senior female team who won the national marathon championship in 2016 and 2017, finishing second in 2018.

Jérôme is qualified as an Athletics Ireland Assistant Coach and Level 2 in Athletics Coaching, as well as a been a level 4 Injury Sports Massage Therapist with IMST (Institute of Massage and Sports Therapy) and ITEC (International Therapy Examination Council).

He races regularly, preferring the longer distances and has completed more than 30 marathons (IAAF profile) and many ultra-marathons up to 100 miles (D.U.V. profile).