Tamindei was born around 1918 in Loneim, a village near Maprik.[1] He did not receive a formal education and became a coconut and coffee farmer and trader.[1] He was one of the early adopters of rice growing in the Sepik area, as well as trying gold mining.[1][2] He was also involved in the Mitpin Rural Progress Society.[1]
Prior to entering politics, he had served as a luluai (village headman).[1] He became the first president of Maprik Local Government Council in 1958, serving until 1960. He was then vice-president from 1961 until 1963, before briefly serving as president again in 1964.[1] In the first general elections under universal suffrage in 1964, he successfully contested the Maprik seat, becoming a member of the new House of Assembly. He ran for re-election in the February–March 1968 elections, but was heavily defeated by Pita Lus.[3]
Tamindei died in June 1968, aged around 50.[2] He was married with three children.[1]
