Düzyol was born on September 19, 1964, in Izmir. He graduated from the Department of Civil Engineering at Middle East Technical University (METU) in 1988. After working as a design engineer in the private sector briefly, he commenced his career at the State Planning Organization (SPO) in the same year. He earned the title of Assistant Specialist through a competitive exam in 1989.
In 1992, he completed his diploma studies in "Development Economics" at the University of East Anglia in the United Kingdom, and with his expertise thesis titled "Building Construction Sector and Demand Forecast for the Period 1990-2010," he was appointed as a Planning Specialist in 1993. He furthered his education by obtaining a master's degree in "Economic Policy" from the University of Illinois in the United States during 1995-1996.
Beginning in early 1996, Düzyol continued his career at the General Directorate of Economic Sectors and Coordination (DGES) of the SPO, specializing in the Department of Project, Investment Evaluation, and Analysis. His dedication led to his appointment as the department head in 1999. He served as the Director General of the DGES from 2003 to 2009, and in September 2009, he was appointed as the Undersecretary Deputy of the SPO.
Following the restructuring of the SPO into the Ministry of Development in 2011, he continued his role as the Undersecretary Deputy of the Ministry. On December 2, 2014, Düzyol was appointed as the Undersecretary of the Ministry of Development. He also served as the Minister of Development in the 63rd Government from September 22, 2015, to November 24, 2015. After his term as a minister, he returned to the position of Undersecretary of the Ministry of Development, which he held until the transition to the Presidential Government System. Currently, he holds the same title as a member of the Ministry of Interior.
Between 2011 and 2018, he assumed various high-level positions, including Vice Chairman and Member of the Board of Directors of the Development Bank of Turkey, Member of the Board of Directors of Ziraat Portfolio Inc., and Member of the Board of Directors of Boğaziçi Electricity Distribution Inc. Due to his extensive experience and high-level positions, he also chaired and served as a member of various committees and commissions in the public sector.
Düzyol possesses a wealth of experience in designing and developing development plans, sectoral programs, regional development plans, medium-term economic programs, annual programs, and public investment programs. His expertise extends to planning and analyzing public investment projects in various fields, including Public-Private Partnership (PPP) projects. He has provided training to public institutions on Project Cycle Management, international finance, development organization relations and negotiations, target-oriented project planning, and participatory moderation techniques, among other topics.
Düzyol is also a co-author of the book "Planning and Analysis of Public Investments," and he has authored numerous articles on project cycle management. Beyond his professional accomplishments, Düzyol is married and has two daughters.