He was an assistant to the general manager for the Russian Ice Hockey Federation from 2004 to 2007 and participated as a member of the team staff at four IIHF Ice Hockey World Championships, three IIHF World Junior Championships and the 2004 World Cup of Hockey.
Between 2007 and 2011 he was the General Secretary of the Belarusian Ice Hockey Association. During this period he led the successful bid to host the 2014 IIHF Ice Hockey World Championship in Minsk, managed National League competitions, and organized several major events including the 2010 IIHF Ice Hockey U18 World Championship in Minsk and the KHL All-Star Game 2010.
He was involved in the building of a Dinamo-Minsk team and in the negotiation process of its joining the KHL, assisted in the construction and running of the 15,000-seat Minsk Arena. He also acted as a team leader for the national team at several IIHF World Championships and the 2010 Olympic Winter Games in Vancouver.
In 2011 he took the lead of the Lviv 2022 Olympic Winter Games bid. In his capacity as the bid CEO and Adviser to Mr. Sergei Bubka, Ukrainian NOC President and IOC Executive Board member, Gontcharov oversaw coordination among numerous stakeholders, cooperation with the International Olympic Committee and Sports Federations, as well as creation of strategical and operational concepts and long-term development plans for Winter Sports and Tourism.
He has been closely involved with the Olympic Movement and international sports industry as an independent adviser on various projects and campaigns, continuing his professional growth by participating in high-profile workshops and conferences on Olympic Games and International Federations Management, as well as major sports events. He was also a member of the World Athletics International Relations Commission.
In November 2014 he returned to the Belarusian Ice Hockey Association as an advisor and was elected as Vice President of the Board in May 2016.
Gontcharov was a member of the IIHF Event Committee from 2008 to 2016. Serving on the IIHF Council and chairing the IIHF Officiating Committee since 2016, he was part of the IIHF Negotiation Group for evaluating prolongation of the agreement with the IIHF Commercial Partner, has been actively involved with developing the Unified Rule Book, and introducing the more transparent process of Licensing and Nominating Game Officials.