Career
He is currently coach of Mendiola United F.C. Caslib has also been the head coach of the Seniors" Football team of San Beda College, the Red Booters. Caslib played high school football for Claret School and in inter-collegiate tournaments, notably the National Collegiate Athletic Association, for San Beda College. While playing for San Beda College, Caslib was active in the student movement as year-level representative in the San Beda College of Arts and Sciences Student Council and political officer of the Makabayang Kabataang Magazine-aaral ng San Beda (Makamasa).
Philippine national team
Caslib led the under-23 national team at the 2005 Southeast Asian Games as head coach/
Caslib managed the Philippines squad which competed at the 2007 Association of Southeast Asian Nations Football Championship.
After the team could only manage one draw and two losses, Caslib quit the national team in February 2007. He later serve a non-consecutive term as head coach of the national team, last guiding the team at the 2006 AFC Challenge Cup
In 2016 Caslib was appointed as chief deputy of the senior national team under head coach Thomas Dooley.
He succeeded Sebastian Stache.
