Kristomei began his career in the Army Strategic Reserve Command and was sent to Aceh, which at that time was declared as a military operation region due to the activity of insurgents. He completed his duty in Aceh in 2003 and was sent to the United States to study intelligence for seven months. Upon returning from Indonesia, Kristomei planned to get married, but delayed the plan as he was sent back to Aceh to command troops for the Indonesian offensive. He and his troops were withdrawn following the signing of the Helsinki peace agreement on 15 August 2005, which ended the conflict. He got married shortly after his withdrawal.[2]
Kristomei reached the rank of captain and was assigned to the 328th Airborne Infantry Battalion as deputy commander in 2010. After two years of service, he was sent to attend the Indonesian Army Command and General Staff College in 2012. He received an award for the best military paper.[3] He was briefly assigned as an assistant officer for operations in the Army Strategic Reserve Command before being appointed as the commander of the 305th Airborne Infantry Division in Karawang.[2] Aside from his duty as battalion commander, Kristomei was also involved in writing Indonesia's Ministry of Defense 2014 white paper.[4]
During his command, an incident occurred in which several soldiers from the battalion clashed with the Karawang police. The incident stemmed from a misunderstanding between a member of the battalion, who was accompanying his wife to work in the Karawang city council, with a police member from the Mobile Brigade Corps who was guarding a labor protest near the city council building. Kristomei later visited two police members who were wounded due to the incident and provided financial assistance for their treatment. Kristomei publicly apologized on behalf of the battalion and stated that the battalion was instructed to repair the police guard posts destroyed during the clash.[5][6]
After serving in the battalion, in 2014 Kristomei was sent to his home province, Lampung, where he commanded the Tanggamus Military District. Under Kristomei, the military district set agriculture self-sufficiency for Tanggamus as one of its main goals and cooperated with the local government to provide locals with agriculture training.[7] He ended his assignment in Tanggamus on 22 April 2016[8] and returned to the Army Strategic Reserve Command as the deputy assistant for operations. Less than a year after that, he became the personal secretary to the deputy army chief of staff, Hinsa Siburian. Hinsa retired several months after holding the position and Kristomei was replaced as private secretary by Hinsa's successor.[2]
Kristomei then became the information chief (spokesperson) of the Jayakarta (Jakarta) Regional Military Command on 12 September 2017.[9] Shortly after his appointment, Kristomei gathered web admins of the military units in the Jakarta Regional Military Command and instructing them to "increase the quality of publications".[10] Kristomei was promoted to the rank of colonel on 1 April 2018.[2] He also briefly attended a course on joint military operation, which he completed with the distinction as best graduate.[11] He handed over his position as information chief on 2 August 2019[12] and underwent advanced military education at the Indonesian Armed Forces Staff and Command School.[11]
Kristomei was sent to North Sumatra after his education and became the assistant for operations in the Bukit Barisan Regional Military Command on 29 June 2020.[13] At the time of his appointment, the government's effort to handle COVID-19 pandemic was in full swing. Kristomei was instructed by the assistant for operations to the army chief of staff, Major-General Surawahadi, to establish a COVID-19 response team for the Bukit Barisan Regional Military Command.[14]
Aside from his duty as assistant for operations, Kristomei was then appointed as a member of the public communication team of the COVID-19 Response Acceleration Task Force. Kristomei was noted to host several talkshows by the COVID-19 Response Acceleration Task Force to educate the public regarding the government's policy on the COVID-19 pandemic.[15]
After serving as assistant for operations, Kristomei was transferred to the Iskandar Muda Regional Military Command in Aceh as the commander of the main regiment on 3 February 2022.[16] He was replaced as commander of the main regiment on 23 December.[17] He was reposted to the army headquarter as assistant officer for domestic military operations in the army headquarters operational staff.[11]
On 7 October 2023, the Commander of the Indonesian National Armed Forces Yudo Margono issued a decree which appointed Kristomei as the Chief of the Army Information Services,[11] a position commonly known as the army spokesperson.[18] He replaced Hamim Tohari, who became the expert staff for environment to the army chief of staff.[19] Kristomei was promoted to brigadier general on 26 October[20] and was officially installed for the position five days later.[19] He handed over his position on 20 August 2024.[21]
After serving as spokesperson, Kristomei was assigned to the Indonesian Military Academy. He was the commander of the military academy's cadet regiment from 30 August[22] to December 2024. On 6 December 2024, he was appointed as the deputy governor of the military academy.[23] He briefly assumed this position for three months from 8 January 2025[24][25] before being appointed to the two-star position of the chief of the armed forces information service (spokesperson) on 14 March 2025.[26] He was installed as spokesperson six days later[27] and became a major general on 8 May.[28]
On 6 August 2025, Kristomei was appointed to command the newly formed 21st Radin Inten Regional Military Command, covering the Lampung and Bengkulu province.[29] He was installed four days later in a military ceremony by President Prabowo Subianto.[30]
Indonesian Army