Ernest Thomas Nierras is the current head coach of Stallions F.C.. He was also head coach of the Philippine women's national football team.
Nierras has coached the women's team of the Muntinlupa-Parañaque-Las Piñas F.A. (MPL-FA). The under-17 team under Nierras won the 2006 PFF National Women's U-17 Championship which was held in San Carlos, Negros Occidental in May. MPL-FA defeated Iloilo in the finals with the scoreline of 2-1 at the finals held at the San Julio Realty Football Field. MPL-FA became the first associate member of the Philippine Football Federation to win the championship.
Nierras, along with Cathy Rivilla, were named team managers of the Philippine women's national football team under head coach Marlon Maro in 2005. They were first task to manage the national team that will take part at the 2005 Southeast Asian Games. The involvement of Nierras' daughter, Samantha prompted him to take the job as one of the co-manager of the team.
He later became the head coach of the national team. His last stint as head coach was at the 2013 Southeast Asian Games. Buda Bautista, appointed in May 2015 succeeded him as head coach.