In 2012, he was assigned to Davao City as the new director of the Davao City Police Office. In 2011, he became the chief of the Regional Logistics and Research Development Division (RL-RDD) in PRO-Davao. In 2009, he was moved to Davao del Sur where he served as director of the Davao del Sur Provincial Police Office (DSPPO). In 2008, he was promoted to a rank of Senior Superintendent. In 2007, he became the director of the Compostela Valley Provincial Police Office (CVPPO) as its police chief. After eight months, he was transferred back to PRO-Davao and was promoted as chief of the Regional Intelligence and Investigation Division (RIID). In 2005, he was assigned to the Davao City Police Office (DCPO) as a city personnel officer. He was then transferred to the Directorate for Human Resources Doctrine and Development as head of training.

In 2003, he was promoted to Police Superintendent and was assigned to Camp Catitipan in Davao City. In 2001, he returned to PRO-Davao and continued his service as deputy chief of the Office of the Regional Personnel and Human Resource and Development Division (ORPHRDD) of Region XI. In 1999, he was assigned to the office of the Police Director of the Philippine National Police (PNP) at Camp Crame in Quezon City. In 1997, he was designated as police provincial director of Compostela Valley. In 1992, he was designated as Chief Inspector and worked as one of the staff at Police Regional Office (PRO)-Davao. Dela Rosa later became Davao City police chief.ĭela Rosa joined the police force in 1986 as a Lieutenant of the now-defunct Philippine Constabulary in Davao City. Police career Early career (1986–2012) Dela Rosa (far left), then a police senior inspector, watches as Davao City Mayor Rodrigo Duterte inspects an assault rifle. ĭela Rosa was nicknamed 'Bato' during his first assignment in Davao, when his upperclassmen likened his body to a rock. Army Ranger School in the United States, and Air Marshal Instructors Course by the Australian Federal Police. He also attended training courses of the FBI Academy and U.S. ĭela Rosa completed a Scout Ranger Orientation Course, Police Intelligence Officer Advance Course, Police Officers' Comptrollership Course, and the Police Safety Officer Course. in development administration in 2006 from the University of Southeastern Philippines in Davao City. He then earned a Master of Public Administration degree in 1998 and a Ph.D. In 1982, he left MSU to join the Philippine Military Academy (PMA) and graduated in 1986 as part of PMA Sinagtala class. The young Dela Rosa worked as a fish market porter and bus conductor.ĭela Rosa is a senator who went to Mindanao State University (MSU) to study for a Bachelor of Science degree in public administration.

His family was 'dirt poor' as his father earned little money working as a tricycle driver. Ronald Marapon dela Rosa was born on January 21, 1962, at Barangay Bato, Santa Cruz, Davao del Sur, to Teodoro Diamaton dela Rosa Sr.

He served under the Duterte administration as the chief of the Philippine National Police from July 1, 2016, to April 19, 2018, overseeing the government's anti-drug campaign he also served as the Director General of the Bureau of Corrections from April 30 to October 12, 2018. Ronald Marapon dela Rosa (born Janu), also known as Bato, is a Filipino politician and retired police officer who is currently serving as a senator of the Philippines since 2019.

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