Following his retirement, Lema assumed the role of technical assistant within the staff of
Antonio Mohamed. Over the course of 19 years, he fulfilled this role at:
Huracán,
Veracruz,
Colón,
Independiente,
Tijuana,
Club América,
Monterrey,
Celta de Vigo,
Atlético Mineiro and
UNAM. On 12 December 2023,
Antonio Mohamed abruptly left
UNAM and Lema succeed him as head coach. On 26 February 2025, Lema was relieved of his duties. On 17 November 2025, Lema was appointed as the manager of Chilean club
Audax Italiano. ==References==