The GMSTEK team has decades of business and software experience in multiple industries and with clients ranging from start-ups to Fortune 500 companies. We have expertise in many languages and platforms, so each project can be developed in the language and on the platform that fits its unique needs.

Several years and millions of dollars ago, GMSTEK began developing X-1FBO. In 2016, X-1FBO was launched to wide acclaim at the National Business Aviation Association Convention & Exhibition in Orlando, FL.


James Wiley


In an over 24-year career in the FBO business, Mr. Wiley has served in multiple operating positions including Line Service Technician, Line Service Manager, Flight School Manager, Ground Services Manager, Operations Manager Transition Manager (for acquisitions), Assistant General Manager and General Manager. He began his career at Priester Aviation and subsequently served at DB Aviation, Mercury Air Center, Million Air, Sheltair and Landmark Aviation where he was the General Manager of their Opa Locka FBO. Wherever he has been, he has improved operations, resulting in increased margins and profitability. Mr. Wiley is a licensed pilot. He holds a B.S. in Aerospace Science from the State University of New York.

Stephen Sandler

Co-Founder and CFO

Mr. Sandler has over 25 years of experience in providing corporate strategy, marketing communications and strategy, and financial services for a wide range of companies. Prior to GMSTEK, Mr. Sandler was the founder and president of SRK Group, and founder and president of VMARK Associates. Both were leading marketing strategy and communications firm serving the life sciences industry and other clients. Products for which Mr. Sandler and his firms provided services have generated revenue in the billions of dollars. Clients included Boston Scientific (18 years), Johnson & Johnson, Smith & Nephew, as well as many early stage companies. Earlier in his career, Mr. Sandler served as the CFO of Research Media, Inc. a company that developed product launch and educational programs for pharmaceutical firms. Prior to that, he was the CFO of National Information Services, a publicly held minicomputer systems company. Mr. Sandler began his career with Peat Marwick, Mitchell & Company (now KPMG) where he passed the CPA examination. He is a graduate of the University of Pennsylvania.

Humberto Zuluaga

Director IT Infrastructure

Humberto is an IT Professional with over 20 years of hands-on IT Management for companies like Mondelez, Kraft Foods and Cadbury Schweppes. His background includes the design and implementation of cloud based solutions using market leading platforms like AWS (achieved several important certifications), and the implementation and management of Infrastructure Services like Network, Hosting, Telephony, End User Services and Help Desk for big scale companies with thousands of users. Working a big part of his professional career on the customer side has given him a clear understanding of the customer´s needs and the type of partnering that must exist between a technology company and its customers.