IOANNIS NTISKOS, Chief Executive Officer

John is the founder of JETSTREAM SA. and has been the Chief Executive Officer since 2008. With over 40 years of experience in the airline industry, he leads JETSTREAM’s business segments in Athens and Dubai. After studying economics, he obtained a commercial pilot's licence from Oxford Aviation Training in 1981. He began his airline career in 1985 at Olympic Airways as a captain, instructor, and examiner on B737, A300, and B747 types, accumulating extensive managerial experience in the airline's training and safety departments. He manages and coordinates the company's strategic plans with regional and global partners. Over the years, airline operators, regulatory authorities, defence forces, and individuals have increasingly collaborated with JETSTREAM for training.

DENNIS TSITOURAS, Head of Training

Dennis joined JETSTREAM in 2016 as the Head of Training. He is an experienced aviation professional with extensive expertise in airline operations, management, and training. Throughout his career, he has accumulated an impressive 23,600 flight hours as a captain, instructor, and examiner flying the big jets. His exceptional skills and dedication to aviation have earned him great respect within the industry. Dennis is a valuable asset to our organisation, boasting a diverse background in operations, instruction, and management.

NICOLAS BOULENGER, Chief Flight Instructor - ATO

Nicolas joined JETSTREAM in 2008 and has 25 years of extensive experience in aviation. He has accumulated 6,000 flight hours as a pilot, instructor, and examiner, specialising in both helicopters and aeroplanes. Throughout his career, Nicolas has provided VIP helicopter services for many years and has participated in various aerial activities. With a multicultural background and strong interpersonal skills, he has lived in France, Belgium, Greece, and the United State

SAKIS ARPATZOGLOU, Compliance & Safety Manager - ATO

Sakis has been with JETSTREAM as Compliance and Safety Manager since its establishment in 2008. He ensures that all training and procedures comply with the regulations set by the European Aviation Safety Agency (EASA) and the Hellenic Civil Aviation Authority. With over 30 years of experience in the airline industry, he specialises in compliance, safety, auditing, and accident investigation courses. 

SHERIF SIAM, Chief Theoretical Knowledge Instructor - ATO

Sherif has been the JETSTREAM's Chief Theoretical Knowledge Instructor since 2023. He is an EASA licensed Commercial Pilot with degrees in Aeronautical Science and Mechanical Power Engineering. He speaks Arabic and is fluent in English, while his experience in Egypt, Saudi Arabia, and Europe helps him connect with international trainees. Sherif and his team guide their classes through theoretical training, contributing to their success in passing EASA exams. We’re pleased to have him on our team.

KERAMIOTIS STELIOS, Quality Manager - Part 147 

Stelios is the appointed Quality Manager in Part 147 of JETSTREAM MTO. He is an aeronautical engineer with an aircraft maintenance engineering license and extensive experience in both military and civil aviation, serving as Quality Manager on P147 duties. With decades of experience in the Hellenic Aerospace Industry, he specialises in RR, P&W, and GE engines and has served as a team leader for Lockheed Martin on the F-16 upgrade program. 

SAKIS ARPATZOGLOU, Examination Manager - Part 147 

Sakis has been with JETSTREAM since its establishment in 2008. He ensures that all Part 66 examinations comply with the regulations set by the European Aviation Safety Agency (EASA) and the Hellenic Civil Aviation Authority. With over 30 years of experience in the airline industry, he specialises in compliance, safety, auditing, and accident investigation courses.