He last coached Colegio de San Juan de Letran's men's basketball team of the National Collegiate Athletic Association (Philippines) (NCAA) In 1988, Tan played under Alfrancis Chua's Grace Christian High School (now Grace Christian College).
[3] In 1991, Tan served as Goldwin Monteverde's assistant in Saint Stephen's High School's developmental team, while studying in UST.
[5] Tan coached Lyceum to two unbeaten seasons in the Inter-Scholastic Athletic Association, and qualified to four straight Philippine Collegiate Champions League tournaments.
[11] At the height of COVID-19 pandemic, Alfrancis Chua, Letran's special assistant to the rector for sports development, denied Tan will be replaced by just resigned UST Growling Tigers coach Aldin Ayo.
[16] Rhenz Abando, one of the transferees from UST, was named the NCAA's Rookie of the Year and Most Valuable Player.
[18] On April 23, 2023, Tan was officially promoted as the full-time head coach of the NorthPort Batang Pier.