Sixto was born in the Philippines from a Chinese father and a Filipina mother. He completed his degree in Bachelor of Science in Commerce in Lyceum of the Philippines. He was an employee of the NEA for around 13 years. Then, became a general manager of ILECO 2 for around 10 years. He moved to Canada in 1997, with his wife Jocelyn Escare & five children. At present, he is employed at Service Canada.

He became a local elder with UCG in 2001.