Siot Tanquingcen

Tanquingcen was appointed as one of the assistant coaches of the De La Salle Green Archers since May 2015. He has also returned to the San Miguel Beermen in the PBA as an assistant coach for the 2015-2016 season.

Tanquincen took over the coaching duties of Barako Bull from Bong Ramos after a dismal 2-7 win-loss campaign in the 2014 PBA Commissioner's Cup. In his first conference with Barako during the Governors' Cup, his team barely squeaked in the quarterfinals with 3-6 win-loss record, and was eliminated by Talk 'N Text.

SMC made its announcement in August 2010 that Ato Agustin will be the new head coach of the San Miguel Beermen beginning 2010-11 season. Siot Tanquincen has been transferred back to the Barangay Ginebra Kings as assistant to Jong Uichico.

Their run continued in the quarterfinals, scoring an upset against his former team, Barangay Ginebra, in the best-of-three series before falling to eventual champion Alaska Aces in a grueling six-game tussle. In 2009 fiesta conference they (San Miguel Beermen) defeat the crowd favorite baragay ginebra kings in seven games 90-79 to get his third pba title as a head coach.

In the 2007 PBA Fiesta Conference, Tanquingcen was sent back to San Miguel as an interim coach for Chot Reyes, who focused his role as head of the Philippine national basketball team. At the time Tanquingcen was named head coach, San Miguel struggled with a 0-6 record, and eventually posted a 1-7 card.

During the 2006 offseason, Jong Uichico was named as the new head coach of the Barangay Ginebra Kings, after a big overhaul by almost all of the then-four PBA teams of San Miguel Corporation (the Coca-Cola Tigers is now under the Coca-Cola Company). Tanquingcen, however, was demoted as Uichico's assistant, reprising the role he had with the Beermen.

As coach, Tanquincen has won three PBA championships - two with Barangay Ginebra San Miguel (2004 Fiesta Conference and 2004-2005 Philippine Cup) and one with the San Miguel Beermen (2009 Fiesta Conference).

Tanquingcen would return to his assistant duties for the next two seasons. However, midway through the 2004 PBA Fiesta Conference, Barangay Ginebra mentor Allan Caidic was relegated as team manager and hired Tanquincen from its sister team as its new head coach.

In the 2004-05 Philippine Cup, Tanquingcen once again led the crowd-favorites to its first back-to-back title in franchise history after defeating the Talk 'N Text Phone Pals in six games.

After his stint with the Dragons, Tanquingcen became the assistant coach of the San Miguel Beermen under Jong Uichico. In 2002, Tanquingcen was the team's interim coach with Uichico tasked to lead the Philippine national basketball team in the 2002 Asian Games. Despite a limited lineup of Dorian Peña, Boybits Victoria and imports Lamont Strothers, Art Long, Shea Seals and Terquin Mott, he coached the Beermen to a respectable fourth-place finish in the Governor's Cup and finished third in the Commissioner's Cup.

He also played for the San Miguel Beermen from 1997 to 1998 as a 12th man for the team. In 1999, he joined his former UST mentor del Rosario in the MBA's Pampanga Dragons, usually as its starting point guard.

He went undrafted in the PBA Rookie Draft in 1995 but was signed by Sunkist late in the season. He got to play for a total of three games.

Tanquingcen was one of the role players for the UST Tigers in their historic four-peat run from 1993 to 1996 under head coach Aric del Rosario. Other members of the said squad were Chris Cantonjos, Estong Ballesteros, Rey Evangelista, Dennis Espino and Bal David.

He also played as the starting point guard for the Philippine team, alongside Poch Juinio that won the gold medal in the 1993 Southeast Asian Games.