Dery had his secondary school education at Navrongo Secondary School. He entered the University of Ghana in 1997 and graduated afterwards with a BL and LL. B. He was called to the Bar in 1982. As legal Practitioner, he cofounded a legal chamber in Bolgatanga with the late Laary Bimi. He later became founder, head and managing director of Dery & Co, an Accra-based law firm.
Political career Before entering parliament in 2008, Dery was appointed Deputy Attorney General in 2003. He also served in two ministerial positions as the Regional Minister for the
Upper West Region from 2004 to 2006 and Minister of State in the Ministry of Justice from 2005 to 2007. He won the Nandom parliamentary seat, then Lawra-Nandom Constituency in 2008 but lost the seat to
Benjamin Kumbuor in the 2012 elections. and was later relieved from office on February 14, 2024, prior to the end of his tenure of office. == Personal life ==