|Date of birth||24 May 1986|
|Place of birth||Athens, Greece|
|Height||1.80 m (5 ft 11 in)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 9 April 2017.
Kontoes is known for his technical ability, solid defending, pace and constant overlapping runs. Kontoes also got the most assists for Panionios in the season 2010/11. Kontoes was listed as best Left Back in the starting 11 by Superleague Greece due to his consistent performances.
When Panionios signed him, everybody in the club trusted him and he was ready to improve himself in order to meet the expectations of Panionios. He was rewarded for his efforts as Panionios fans loved him and his passion. So, the club decided to renew his contract with Kontoes. He was teammate of Grigoris Makos. Some years later, both of them played for AEK Athens.
On August 1, 2011, Kontoes signed a three-year deal with AEK Athens on a free transfer keeping him at the club until 2014. Kontoes was a key target for AEK Athens as he is a versatile player who can play as right back, left back and centre back. He also had a very impressive season at Panionios and was named Panionios player of the year and MVP Left back in the Superleague Greece. Just before signing with AEK Athens, Panionios tried one last attempt on keeping Kontoes at Panionios and offered a higher contract than AEK Athens, however Kontoes declined the offer and signed with AEK Athens as he wanted to play in European competitions and contend for the Superleague Greece. Kontoes made his debut for AEK Athens in a 1-0 away win against Skoda Xanthi. Kontoes' second match of the season was against his former club Panionios where he received a lot of criticism from the fans as he left the club after 4 years and joined Athens rivals, AEK. Despite the criticism, Kontoes played a very solid game and was awarded the MVP award, the final score was a 1-0 away win for AEK Athens.
Kontoes became quickly very important for his team and for 2012-13 season he is expected to be one of the leaders in the "yellow-black" squad. He played mainly as a left back, but also and as a center back. In December 2012, Kontoes decided to "break" his contract with AEK Athens due to financial reasons.
On September 4, 2014 Kontoes signed a deal with Atromitos, replacing Kostas Giannoulis who moved to Olympiakos. On 14 September, he made his debut with the club in a 0-0 home draw against Panetolikos. On 19 June 2015, he extended his contract with the club by two years for an undisclosed fee. On 17 May 2017, he solved his contract with Atromitos F.C. after 3 consecutive years with the club.