Kopitsis started his career in 1984 at Orfeas Aigaleo and in the summer of 1986 he was moved to Egaleo.
In December 1987 he was transferred to Panionios, where he gradually earned a starting position the following season, when the team reached the final of the Greek Cup in 1989.
He had remarkable performance in April 1993 at the crucial home derby against Panathinaikos, where he unleashed a firebolt and made the final 3–1 for AEK, he even saw a red card because he took off his shirt in celebration.
[2] In January 1994 he also had a great performance against the same opponent scoring the first of the 2 goals, with a power shot, that led AEK to win the match and eventually the title.
From 2020 he became the director of football at Egaleo and at the same time he worked as a coach at Akratitos.