Certified Aviation Services, LLC (CAS) is an independent provider of MRO services for fleet operators, lessors, OEMs and Adjusters globally. Backed by more than 500 world-class A&P mechanics, and 30+ years of service, CAS is an industry-leading performer. CAS takes pride in its commitment in workplace safety, high-quality, and cost-effective alternatives for the overall satisfaction of their customers. Throughout our nationwide network, CAS conducts line maintenance, modifications, installations, component overhaul, as well as heavy recovery and repairs. Each division is committed to providing its operational expertise and comprehensive solutions when and where they are needed.


Mark Lee, Manager, Chairman, Chief Executive Officer

1150 S. Vineyard Ave.
Ontario, CA 91761
Ph: (949)706-8610

Mark Lee is the Chairman and Owner of Aero-Mark LLC, which currently owns CAS (Certified Aviation Services). Mr. Lee has owned operating companies with a primary emphasis in the aerospace industry over the past 25 years. 

Mr. Lee has other holdings in real estate, restaurants, and energy as well as an investment portfolio. Prior to owning his own businesses, Mr. Lee was President and CEO of American Pacific Corporation and was instrumental in its creation through several acquisitions. Before entering the aerospace, business Mr. Lee was involved in international business and real estate. 

Mr. Lee accomplished his undergrad degree from UCLA and his MBA degree from Stanford University. In 2020, he served on the AIA ExCom. Mr. Lee also holds a CPA certificate. 


Brad Caban, President of CAS

1151 S. Vineyard Ave.
Ontario, CA 91761
Ph: (251) 928-8800
F: (251) 928-8853
Cell: (909) 781-8472

Brad Caban began his career in the USAF as an F-16 Crew Chief, serving from 1985 to 1991. Later, after becoming an FAA certified A&P mechanic, he gained experience in the aviation industry while working for Delta Air Lines in Aircraft Maintenance, Engineering and Flight Operations. 

In 2010 Brad served as President and Chief Operating Officer of Aero-mark LLC. He was instrumental in acquisitions and in the management of Aero-mark entities with a specific focus on restructuring and P&L management. Soon after, Brad would return to his maintenance roots by becoming President of CAS Material Services located in Fairhope AL, Brad’s hometown. Recently Brad has been promoted to serve as the President of CAS. 

Brad is an Instrument rated pilot. He is a graduate of Embry-Riddle Aeronautical University with a BS in Professional Aeronautics. 


Paulina Todd, Vice President Marketing and Finance

1150 S. Vineyard Ave.
Ontario, CA 91761
Ph: (909)458-6491
Cell: (909)210-0751

Mrs. Todd joined CAS in 2016. During her employment with CAS, she has demonstrated strong leadership capabilities through her execution of key business decisions while utilizing corporate strategic objectives with a focus on the leasing market. Mrs. Todd’s position has contributed to the development and the maintaining of integral relationships with stakeholders in the leasing community that has a proven track record of collaboration and seamless connectivity. 

Amongst, Mrs. Todd’s achievements are her leadership role in obtaining CAS’ aftermarket partnership with Boeing (GBS) and Airbus (TSP) which played a pivotal role in growing revenues by 30% CAGR from 2016-2019. 

Mrs. Todd holds a bachelor’s degree from Boise State and an MBA in Aerospace & Defense from the University of Tennessee. She is LeanSigma certified and serves on the Board of Women in Defense – Greater Los Angeles. 


Ron Torres- Vice President Line Maintenance

1150 S. Vineyard Ave.
Ontario, CA 91761
Ph: (310)766-5919

Ron Torres  currently holds the title for Director of Line Maintenance for Certified Aviation Services, LLC (CAS). With over 35+ years experience in the aviation industry and having expertise in technical and strategy, Mr. Torres currently manages all CAS line stations across the United States. In addition to his main focuses being safety, quality, and value- Mr. Torres also seeks future opportunities that align with the corporate strategy. Mr. Torres former position consisted of working at several different 121 carriers.

He joined United Airlines in 1986 and spent the next 28 years in several different leadership roles in Airframe Maintenance, Engine Maintenance, Planning, Airframe Vendor Management, Materials Management, Components, Tooling, and Line Planning. After leaving United Airlines in 2013, he spent 4 years leading Airframe Maintenance MRO 145s focusing on cost, on-time deliveries, safety, and quality.

Mr. Torres holds an FAA A&P license, and his lean sigma greenbelt. He resides in Northern California with his wife and daughter.


Tammy Adams, Director HR

1150 S. Vineyard Ave.
Ontario, CA 91761
Ph: (909)458-6474
Fax: (909)331-3325
Cell: (909)969-8023

Ms. Adams joined CAS in 2019. She brings 10 years of Industry related experience. 

As a Senior Human Resource Leader, Ms. Adams has utilized her 17 years of management experience within the private and public sectors to bring about progressive change to organizations where she has performed. 

Ms. Adams’ combination of decisiveness, strong business acumen, and formal education has achieved for her the effectiveness of balancing out “big picture” thinking and strategic planning to achieve her objectives both professionally and personally. 

Ms. Adams holds a Bachelor of Science in Management from University of Phoenix and, master’s degrees in both Human Resources and Health Care Management.