• Meet our Senior Leadership team.

  • Greg Jarrett

    CEO & Partner

    Commencing his aviation career in 2000, Greg has extensive international experience through roles with DHL Global Logistics, TNT Same-Day, Air Charter Service (London & Dubai), Adagold Aviation and NetJets Middle East. These varied roles included management and procurement of aviation services under Government/Defense contracts, and procurement of charter aircraft in VIP, Cargo and Commercial transport roles. Greg’s early leadership of the Dubai office for Air Charter Service (ACS) was instrumental in ACS becoming one of the major global charter brokers in the Middle East region.


    Greg founded STACK.aero in 2014, building the company’s original technology solution himself. Since then, both the company and its suite of product offerings has grown, with Greg now working as project lead on major accounts. Highly skilled in .NET/C#, JavaScript and APEX programming languages, Greg has built a nexus between these technical skills and his industry experience. Having worked with countless Business Aviation Operators, Government, Defense and VIP Customers, Greg ensures that STACK.aero products operate as tools of competitive advantage.


    Favoring a holistic approach, Greg has found the most effective path to organizational efficiency is via automation and data analysis and has directed all STACK.aero development efforts accordingly. Greg is committed to providing enduring technology to the aviation industry that is dedicated to maximizing growth potential and providing micro and macro solutions.




    Johan Segring

    Vice-President & Partner

    With a Bachelor of Science degree in Aviation Technologies and Management, Johan is uniquely skilled at translating strategic vision and business needs into solid technology-based solutions that improve productivity, service delivery and profitability. Johan is an authority in the Flight Operations System (FOS) from Collins Aerospace and served as the lead application architect for the original mobile application of FOS. Johan is also a specialist in the unique accounting systems required for Aviation operations.

    Beginning his career at InterAir in Sweden in the late 1990s, Johan was later responsible for digitizing several large flight departments, including Chrysler Pentastar Aviation and General Motors. Johan orchestrated and architected multiple transitions from grease boards and paper, to integrated computer-based systems managing dispatch and maintenance operations.


    Following this, a move to more high-level, strategic applications of Information Technology in an enterprise setting saw Johan serve as VP of Business & Information Systems for 11 years of service at FlightWorks Inc., a CARB-approved carrier, Aircraft Management and Private Air Charter company.


    Johan joined STACK.aero as a Director and Partner in 2018, after several years of building his own successful IT consulting firm, functioning as strategic advisor around technology and organizational efficiency to many large aviation organizations.

    Gabriella O'Han

    Key Accounts Director

    After obtaining a Bachelor of Economic and Social Sciences, Gabby quickly established herself as a high performer in Research & Development consulting. Drawing on skills in marketing/sales, project and operations management, Gabby has a track record of increasing customer counts by up to 300%.
    As part of her exposure to the R&D field, she identified opportunities for potential investments and moved into the VC space. Working with a boutique firm, Gabby was the lead on many profitable investment outcomes.
    Her efficient control of major projects led to her being offered a role as
    Co-Founder/COO of an Infrastructure-as-a-Service (IaaS) company, working with leading-edge Cloud technology. Her ability to guide the company through the myriad of issues of this competitive environment resulted in global recognition in 2017, as the only Australia company (one of four worldwide) to be named a "Cool Vendor" in the Gartner 2017 list.
    After successfully exiting, Gabby was introduced to STACK.aero in 2017. Recognizing the pioneering nature of the company, Gabby joined as Key Accounts Director and has been an integral part of its expansion since.
    Since her joining, STACK has experienced solid growth. Gabby ensures that out clients have a high level of representation so that their operational needs are always front-of-mind with the development and support team at STACK.


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