Aplasca was born on August 22, 1963, in present-day Maco, Davao de Oro, which was then under the jurisdiction of Mabini in the undivided province of Davao. He graduated in Maco Heights Central Elementary School in 1976 and Maco Maryknoll High School in 1980 for his elementary and high school education, respectively. In 1987, he obtained a degree in Bachelor of Science in Management major in Security Studies in the Philippine Military Academy (PMA).
Aplasca was appointed as the director of the Philippine National Police (PNP) Aviation Security Group in 2016, and director of the Police Regional Office 4A in 2017. He was elevated to the position of Director for Operations in April 2018. He retired from service on August 22, 2019.
Sergeant-at-Arms of the House of Representatives (2020–2021)
On October 12, 2020, Aplasca was elected as the new sergeant-at-arms of the House of Representatives to replace Ramon Apolinario during an assembly of congressmen allied with Lord Allan Velasco, whom they installed as House speaker on the same day in a special session at the Celebrity Sports Plaza in Quezon City amid a crisis in the speakership. He resigned from the post less than two months later on December 6, 2021, and was succeeded by retired Police Brigadier General Rodelio Jocson.
Administrator of the Office for Transportation Security (2022–2023)
After his brief stint in the House of Representatives, newly-elected President Bongbong Marcos appointed Aplasca as administrator of the Office for Transportation Security (OTS) in 2022, and served in the position until his resignation in 2023 following a scandal involving an OTS personnel swallowing stolen money from a passenger in the Ninoy Aquino International Airport.
Sergeant-at-Arms of the Senate (2025–2026; acting, 2026)
On the opening of the 20th Congress in July 2025, Aplasca was elected sergeant-at-arms of the Senate upon being nominated by Senator Ronald dela Rosa, a batchmate of his in the PMA. He was succeeded by Edgardo Rene Samonte in February 2026, and was subsequently elected sergeant-at-arms of the Commission on Appointments.
Aplasca was designated as the acting sergeant-at-arms of the Senate on May 11, 2026, upon the resignation of Samonte, amidst the attempted arrest of Senator Ronald dela Rosa on the same day after agents of the National Bureau of Investigation (NBI) and former Senator Antonio Trillanes IV came to the Senate to implement an alleged warrant of the International Criminal Court (ICC) against dela Rosa for his role in the Duterte administration's war on drugs. His reinstatement was moved by dela Rosa himself and approved by a majority of the senators. He gained widespread media coverage for being involved in the alleged shootout between members of the Office of the Sergeant-at-Arms and alleged armed men attempting to enter the Senate, reported to have been "perceived NBI agents," in a renewed effort to arrest dela Rosa.
After the incident, Interior Secretary Jonvic Remulla said initial findings indicate there was no attack on Senate and that Aplasca fired the first shots. Based on CCTV fotoage, Remulla noted that Aplasca fired shots towards an area "with no direct threat to him."
Major General