Nevzat Tüfekçioğlu was appointed to the Ministry of Finance Assistant Tax Inspector in 1963 and to the Ministry of Finance Tax Inspector in 1966. He resigned from public service in 1974 and served as Assistant Coordinator, Coordinator, Vice President and Head of Audit and Financial Group in Koç Holding Financial Group, and retired in 2001. Tüfekçioğlu served as Koç Holding A.Ş. Auditor between 2001-2006, Evyap A.Ş Board Member between 2005-2006 and Kıraça Holding A.Ş. Board Member between 2013-2017. He still serves as a Member of the Board of Directors of Koç Consumer Finance A.Ş, and a Member of the Board of Entek Elektrik Üretimi A.Ş.