2010-11: Atte Makinen skated for the Tappara Tampere club in Finland — splitting the year between the club's U18 and U16 teams — and played for Finland's U16 team. He had 1 assist and 8 penalty minutes in 14 games with Tappara's U18 team. In 28 U16 games, including seven playoff contests, he scored 8 goals with 12 assists and had 35 penalty minutes. He played 16 international contests for Finland's U16 team; scoring 1 goal with 5 assists and 10 penalty minutes.
2011-12: Makinen made his pro debut in Finland's SM-Liiga — skating in three games for Tappara — and played for the club's U20 and U18 teams; skating in international play for Finland at the U18 and U17 levels. He had no points and was -2 with 2 penalty minutes in SM-Liiga play. In 34 games for the Tappara U20 team he scored 1 goal with 3 assists and was +7 with 12 penalty minutes. Makinen scored 1 goal with 4 assists and 8 penalty minutes in nine U18 games for Tappara. He scored 1 goal and was +1 with 2 penalty minutes in seven games at the 2012 U18 World Junior Championship. Makinen was a team captain for Finland's U17 team and had 5 assists with 12 penalty minutes in 11 games.
2012-13: Makinen played four games in Mestis with LeKi, was an assistant captain for Tappara's U20 team and won a bronze medal with Finland's U18 team at the 2013 World Junior Championship in Sochi. He scored 1 goal and was +3 with 4 penalty minutes skating for LeKi. He scored 5 goals with 9 assists and was +7 with 71 penalty minutes in 40 regular season games for Tappara and was -4 with no points and 6 penalty minutes in eight U20 playoff games. Makinen had 1 assist and was +3 with 8 penalty minutes in seven games at the WJC. He was ranked 89th amongst European skaters in Central Scouting's final rankings but was not selected in the 2013 NHL Draft.
2013-14: Makinen appeared in nine Liiga game with Tappara as of February — spending most of the season with LeKi in Mestis — and was among the final players cut from the Finland U20 squad that won a gold medal at the 2014 World Junior Championship. He had 1 assist and was +4 with 8 penalty minutes in Liiga play. In 32 Mestis games with LeKi he scored 1 goal with 5 assists and was -9 with 38 penalty minutes. Makinen was ranked 70th amongst European skaters in Central Scouting's mid-term rankings prior to the 2014 NHL Draft.
Makinen is a defense-first defender who plays a simple but effective game. A team leader in Finland's junior national team program, he provides the character and work ethic necessary to be a successful stay-at-home defender. He does not play a particularly abrasive game but has the strength and willingness to stand up for teammates.
Overshadowed by some of the offensively gifted defensemen coming out of Finland in recent years, Makinen is a traditional defender with the prototypical frame to be effective in that role. The pace and physical nature of NHL hockey could be a challenge but long-term he could be a sound defender and strong locker room presence.