GA Telesis Strengthens Global IT Leadership with Appointment of Mika Siitari as Head of IT International Operations in Finland

Author: gatelesis

May 6, 2025 – Helsinki, Finland – GA Telesis (“GAT”) announces the appointment of Mika Siitari as Head of IT International Operations, based in Finland, effective May 12, 2025. Siitari will report directly to Gunnar Mar Sigurfinnsson, and functionally to the Chief Information Officer, Kevin Larson as part of GA Telesis’ global IT leadership team. His appointment underscores the company’s continued investment in international expansion and operational excellence.

Siitari brings over 27 years of leadership and operational experience in the aviation industry. His career began as a technician, and through a series of progressive business and IT leadership roles, he rose to become a key member of Finnair’s Operational Management Team. Throughout his career, he has successfully led diverse teams and strategic initiatives across various facets of airline operations, including Flight Operations, Technical Operations, Operations Control Center, Ground Handling, and Cargo.

During his tenure as Head of IT Operations Applications at Finnair, Siitari held responsibility for IT across the full spectrum of operational units, where he led the agile transformation across the organization and drove several initiatives centered on digital transformation, data-driven decision-making, and process efficiency.

His leadership has been marked by strong collaboration with both internal and external stakeholders, including acting as a liaison officer with EASA authorities in a regulated POA (PART-21) environment. More recently, Siitari served as a CIO in the education sector, where he advanced digital strategies and implemented new technologies to meet evolving organizational needs.

“Mika’s extensive background in operational IT and aviation, combined with his innovative approach to digital transformation, makes him an outstanding addition to our global leadership team,” said Gunnar Mar Sigurfinnsson. “His leadership will be pivotal as we continue to evolve our international IT operations to support the company’s growth and customer commitments within the global aviation industry.”

About GA Telesis 

GA Telesis, a global leader in aerospace solutions, is renowned for its unmatched excellence in aftermarket services and lifecycle management. The GA Telesis Ecosystem™ is a vast global network spanning 54 locations in 30 countries on six continents. The company’s integrated solutions include parts and distribution services, logistics solutions, inventory management, leasing and financing, engine overhaul, and MRO services.

GA Telesis is committed to sustainability through innovative sustainability initiatives and advanced technologies, including digital transformation, and using advanced materials. The company’s aerospace systems and connected aircraft technologies drive efficiency and performance, while its MRO network and 24/7 AOG support provide unparalleled reliability

About GA Telesis Engine Services Oy

GA Telesis Engine Services Oy, based in Helsinki, Finland, is a leading aircraft engine maintenance, repair, and overhaul (MRO) service provider. With a focus on quality, innovation, and sustainability, it delivers comprehensive solutions with its MRO capabilities for the GE CF6-80C2 and CFM56 family of engines. The Company has a rich history of enhancing the performance and longevity of aircraft and jet engines worldwide.

For further information, please contact Rylan France at Rfrance@gatelesis.com