The rise of the team from Onești began in the summer of 1987 when Mecon, sustained by IUGTC Onești (The Heavy Equipment Enterprise Transport Construction), with Steluș Roșca on the bench, managed to promoted in Divizia C winning the Bacău County Championship and the promotion play-off against Chimia Victoria 1–0 on aggregate.

With Nicolae Zaharia as coach, he played in the third division in the following seasons, being generally in the top half of the ranking finishing 4th in 1987–88, 5th in 1988–89, 8th in 1989–90 and 10th in 1990–91.

[1] Changing its name to Meconerg, the team continued to play in Divizia C and after the reorganization of the competitive system in the summer of 1992, finishing 4th in 1991–92, 5th in 1992–93 and 7th as Electromecon Onești in the 1993–94 season.

This merger took place at the initiative of Nicolae Puiu, the president of Electromecon with the support of Simion Albu – manager at that time of RAFO – and of Ion Marian – the leader of the "Rafinorul" syndicate.

The team coached by Professor Toader Șteț was composed of: M. Floria, B. Mandric, V. Jercălau, L. Achim, A. Artimon, I. Pârvu, A. Masati, C. Moldoveanu, Fl.