2009-10: Marek Langhamer skated for HC Pardubice in the Czech Republic – appearing in two games with the club's U20 team while spending most of the year with the U18 squad and playing a handful of games at the U16 level. Langhamer stopped all 22 shots he faced in 30 minutes of action with the U20 team. He appeared in 35 games for the U18 team and was 21-14 with four shutouts while posting a 2.45 goals against average and .924 save percentage. In six playoff games he was 4-2 with one shutout and had a 2.57 goals against and .917 save percentage. Langhamer was 4-4 playing for the HC Pardubice U16 team.
2010-11: Langhamer made his pro hockey debut – appearing in four games on loan to second level club HC Chrudim and was a workhorse for he HC Pardubice U20 and U18 teams. He also represented the Czech Republic in Canada at the 2011 U17 World Hockey Challenge. Langhamer was 1-3 in his brief tenure with HC Chrudim with a 1.68 goals against and .956 save percentage. Playing for the HC Pardubice U20 squad he was 18-19 with three shutouts in 37 games and had a 3.14 goals against and .913 save percentage. Pardubice U20 was second in Group C, missing the playoffs. The Pardubice U18 team was a bit more successful – Langhamer was 9-8 with one shutout in seventeen games and was 4-1 in five playoff games with a 2.25 goals against and .939 save percentage. HC Pardubice U18 reached the final group – finishing fourth.
2011-12: Langhamer played 33 games for HC Pardubice's U20 team and represented the Czech Republic in three tournaments. He was 15-18 with a 3.29 goals against and .909 save percentage for an HC Pardubice team that failed to make the playoffs. Langhamer opened the season playing in two games for the Czech Republic at the 2011 Ivan Hlinka Memorial Tournament in August and represented his country in the 2011 U19 World Junior A Challenge and the 2012 U18 World Junior Championship. Langhamer split the goaltending with Patrik Polivka at the WJAC and was 0-2 with a 4.00 goals against and .875 save percentage in two games as the Czech team finished sixth. The Czech team finished a disappointing eighth as the host team of the U18 WJC. In his two games Langhamer was 1-1 with a 4.77 goals against and .859 save percentage Ranked fifth amongst European goaltenders in Central Scouting's final rankings prior to the 2012 NHL Draft, he was selected by Phoenix in the seventh round (184th overall) and was selected by Medicine Hat (WHL) in the first round of the 2012 CHL Import Draft.
2012-13: Langhamer appeared in 30 games for the WHL's Medicine Hat Tigers in his first season in North America. Sharing the goaltending duties with 20-year-old Cam Lanigan, he was 15-12-1 with 2 shutouts and had a 3.44 goals against and .899 save percentage. The Tigers finished fourth in the Central Division and reached the second round in the playoffs. Langhamer made one playoff appearance in relief of Lanigan, allowing 5 goals on 30 shots in two periods.
Langhamer is very athletic in the crease, possessing quick reflexes and good lateral movement. He also has a quick glove and is comfortable with traffic in front of him and has a battlers attitude. Needs to work on his patience and positional play.
Langhamer had a rough introduction to North American hockey in his first year with Medicine Hat of the WHL. He seemingly has all the athletic tools but must find a way to accompany them with the little things in the game like positional play, staying square to the shooter, and offensive reads. He has another year with Medicine Hat ahead of him where he can hopefully show more comfort between the pipes.