Led by Daniel Bona, the team won the Divizia D – Brașov County title and secured promotion after a play-off match against Viscofil Popești-Leordeni, the Divizia D – Ilfov County winner, with a 2–1 victory after extra time at Poiana Stadium in Poiana Câmpina.

[5] In the following season, Daniel Bona was dismissed in September[6] and replaced by Decebal Cîmpeanu, who led the team to a 9th-place finish and 10th in the following campaign.

After six seasons in the third division, in 2013 Unirea Tărlungeni finished 1st in the sixth series of the competition and earned promotion to Liga II for the first time in its history.

[7] On 18 September 2013 Unirea Tărlungeni was defeated by former national champion Rapid București, relegated to the second echelon by decision of the Court of Arbitration for Sport in Lausanne for financial reasons and after a barrage of maintaining played with Concordia Chiajna with the score 0 -1, at home in a match counting for the third stage of the second league.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.