Career
He later became the Governor of the Nueva Ecija Province in the Philippines from 1959 to 1992, making him the second longest serving politician serving one government position in the Philippines for a span of 33 years. Joson was the captain of Squadron 213 of the guerrilla fighters in the Philippines. Along with Captain Juan Pajota, he led the Philippine guerillas during the Raid at Cabanatuan, the largest rescue of prisoners of war in United States military history.
After the war, Joson took part in helping rebuild the infrastructure of the Philippines.
He was subsequently elected as the Governor of Nueva Ecija, the same province in which the raid took place. He served from 1959 to 1992.
On August 5, 2004, a hospital was dedicated in his honor and college was also named after him.