He was the assistant manager but became manager after previous coach Cosmin Olăroiu got fired.
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When Cosmin Olăroiu took over at Steaua in the winter of 2005 he asked Necula to join him as assistant manager.
Just some days after, Olăroiu was appointed manager by Gigi Becali, the new president, and this time owner, of Steaua Bucureşti, to replace Oleh Protasov.
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He led them to a historical fourth place finish in Divizia A, but in November 2005 he was sacked by the club's owner Marian Iancu who replaced him with .
He joined Poli in the winter break of the 2004–05 season, together with Național coach Cosmin Olăroiu and teammates Gabriel Cânu, Gigel Coman and Marius Popa.