Complex sentence: After returning to Mauritania, he served in the government under Maaouya Ould Sid'Ahmed Taya from early 1986 to September 1987, first as Minister of Hydraulics and Energy, then as Minister of Fishing and Maritime Economy.
Split into simpler sentences: After returning to Mauritania, he was appointed to the government under Maaouya Ould Sid'Ahmed Taya in early 1986. He served first as Minister of Hydraulics and Energy, then as Minister of Fishing and Maritime Economy.