Afterwards, he was assigned to the Indonesian Embassy in Malaysia as a defense attache for the air force. Other positions he had taken included being head of air force training and a wing commander at Halim. In 2016, he was appointed the commander at Halim Airbase, being ranked an air commodore by the end of his tenure, and between 2018 and 2019 he served as commander of operational zones 2 (2018) and 1 (2018–2019) of the airforce. Shortly before he was appointed as Chief of Staff, he was joint commander of defensive region 2, serving directly under the Commander of the Indonesian National Armed Forces.[2][3] During this period, he was promoted to air marshal in November 2019.[4]
He was appointed air force chief of staff on 20 May 2020, and received a promotion to a four-star rank (air chief marshal).[5] Shortly after he was sworn in, he released a 100-day program as chief of staff, which included among others managing the impact of the ongoing COVID-19 pandemic.[6] In September 2020, Fadjar inaugurated a cyber unit (Satsiber) for the Indonesian Air Force.[7]