2010-11: Marko Dano played for the HK Dukla Trencin organization's U18 and U20 teams, and also spent time with the top club in that organization. In 9 games for the U18 club, Dano scored 13 goals and added 4 assists for 17 points. In 4 playoff games for that club, he scored 2 goals and picked up 2 assists for 4 points. Dano played in 28 games for the U20 squad, scoring 18 goals and 22 assists for 40 points to go along with 86 penalty minutes and a +19 rating. In 8 playoff games at this level, Dano scored 4 goals and added 2 assists for 6 points. In 8 games for the top club, Dano picked up 1 assist and registered no points in 3 playoff games. Dano played for Slovakia at the 2011 U18 World Junior Championship, scoring 1 goal and adding 3 assists for 4 points in 6 games. Dano was chosen by the WHL's Prince George Cougars in the first round, 60th overall, of the 2011 CHL Import.
2011-12: Dano spent most of the season with HK Dukla Trencin's top club. In 32 games for that team, he scored 4 goals and added 6 assists for 10 points. In 9 playoff games for Trencin, Dano picked up 3 assists and 18 penalty minutes. Dano also scored 3 goals and added 1 assist for 4 points in 3 games for Trencin's U20 club, then scored 4 goals and 2 assists in 3 playoff games for that team. Dano played for Slovakia at the 2012 U20 World Junior Championship, scoring 1 goal and adding 2 assists for 3 points in 6 games. Dano also represented Slovakia at the 2012 U18 Div. 1A World Junior Championship, scoring 10 goals and adding 3 assists for 13 points in 5 games. Dano was chosen by HC Slovan Bratislava in the first round, 26th overall, of the 2012 KHL Draft.
2012-13: Dano played for Slovan Bratislava of the KHL, scoring 3 goals and adding 4 assists for 7 points in 37 games. He registered no points in 4 playoff games for that club. Dano played for Slovakia at the 2013 U20 World Junior Championship, scoring 4 goals and chipping in 5 assists for 9 points in 6 games. Dano also represented Slovakia at the 2013 World Championship, picking up 1 goal and 1 assist in 5 games.
Dano improved his strength over the last season, which when paired with his explosion in the World Junior Classic, resulted in Columbus snagging him in the first round of the 2013 Draft. The Austrian-born Slovakian improved his agility and awareness in his first KHL season.
Although Dano may believe he is ready to make an immediate impact in the NHL, he will be playing next season with Bratislava in the KHL. His second professional season will give the 18-year-old a chance to further bulk up and fine tune his scoring ability.