Molina played football as a youth for Atlético Madrid.
After obtaining a degree in Sport and Exercise Science at the Polytechnic University of Madrid,[2][3] he returned to Atlético and served as an assistant coach from 2017 to 2020.
He also worked with set-piece coach Andreas Georgson at Arsenal.
[4][5][6] Molina often watches the action from a higher vantage point during games, using a wireless headset to communicate with the coaching staff (usually Stuivenberg and/or Cuesta) on the touchline.
[3][7][8] Molina was part of Arteta's coaching team that guided the Gunners to win the 2020 FA Community Shield on penalties against Liverpool on 29 August 2020[9][10] and win the 2023 FA Community Shield on penalties against Manchester City on 6 August 2023.