From 1988 to 1989, Triglia took part in the championship of Delta Ethniki . In the evolution of E.P.S.A, E.P.S.AN.A., Triglia, under the coaching of Stathis Aslanoglou, who became Triglia's coach in 2007, took part in the final of the E.P.S.AN.A cup in 2009 in Spata's Stadium, where they lost on penalties to Pampaianikos, by a score of 1–1 (regular time) and 4–2 (penalties), winning the second place. The next year they became the champions of Alpha E.P.S.AN.A., and were promoted to Delta Ethniki. The same year, 2010, Triglia qualified for the cup final, in Pallinis's stadium, losing by a score of 1–2 to Oropos, ranking in second place for the second time. In the 2010–2011 season, AC Triglia Rafinas ranked in second place among the teams of the 9th Group of Delta Ethniki, behind Proodeftiki. Also in the 2011–2012 season, Triglia won its stay to the category, by winning the historical Ethnikos Piraeus F.C. in the last match of the tournament. The remarkable thing is that this defeat meant the demotion of Ethnikos to the local championships for the first time. Also, there were some cases of violence after the end of the match by 100 of Ethnikos' fans. In 2012 and 2013 Triglia was promoted to the new amateur category, Football League 2, which was merged with Delta Ethniki, and became amateur. Triglia confirmed their promotion by beating Keratsini with a score of 4–0, at the last match but one of the 9th group.