In 1977, Mr. Celiker graduated from the University of Bogazici, School of Computer Programming. Between 1977 and 1978, he worked for the Central Bank of Turkey. He completed his military service at the Ministry of Defense Data Processing Center. He established the IS Department at Pirelli where he started to work in 1980. He worked as an IT Manager and was a member of the Technical Executive Committee. In 1984, he founded STEP A.S. He specialized in CASE Tools, Software Development Methodology, Implementation Methodology, Project Management and Business Re-engineering. At the beginning of 2006, he joined Arkan & Ergin as a Partner. He has successfully completed ITIL Foundation and received his CobiT certification. He advises clients on Business Re-engineering and IT issues and performs IT Audits.