Prior to that he served as Commander of Naval Operations(CNO) with the rank of Rear Admiral(JG).

Admiral Amungulu joined SWAPO in Angola in 1979 where he undertook his Secondary schooling in Kwanza Sul at the Namibia Education Centre.

At the commissioning of the Namibian Defence Force Maritime Wing in 1998 he was appointed as the Chief of Staff Intelligence.

In 2004 the Brazilian Navy donated the corvette Purrus to Namibia and Amungulu was appointed as the first Captain of the NS Lt Gen Dimo Hamaambo with the rank of Lieutenant Commander.

In September 2017 following the promotion and Appointment of Admiral Nghipandua as Navy Commander, Amungulu was appointed as Commander Naval Operations and in this position he represented Namibia in military exercises such as Obangame Express multinational maritime exercise in 2018.