Cawangan Tambunan telah beroperasi hampir 23 tahun iaitu semenjak awal tahun 1990. Pengurus Cawangan pertama ialah En. Alius Romantis. Ketika itu YUM bermula sebagai Projek Usahamaju dan Pusat pertama yang ditubuhkan ialah Pusat Wanita Pomotodon. Kawasan operasi meliputi DUN N32 Tambunan dan P180 Keningau.
LOKASI PEJABAT
Kompleks Bangunan Majlis Daerah
Tingkat 2, Bilik 7
Tambunan
Tel/Fax : 087 774030
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KAKITANGAN
KOMILUS SIPAT
PENGURUS CAWANGAN ( N41 )
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SIMON ANTHONY TOM
PEGAWAI PINJAMAN ( N27 )
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SABINUS SIMON @ KIMON
PENYELIA PINJAMAN ( N22 )
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JUSTIN POUMIN
PENYELIA PINJAMAN ( N22 )
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MOSIKUN GIMPAH
PENYELIA PINJAMAN ( N19 )
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ROYSTEAVE PIUS
PENYELIA PINJAMAN ( N19 )
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RITA PODTUNG
KERANI AKAUN ( N22 )
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