Our Team

Welcome to TIGHITCO!

Corporate Team

Mark Withrow

President and CEO

Mark has over 35 years of Aerospace experience spanning executive level roles as well as manufacturing, engineering, and operational excellence.  Prior to Joining TIGHITCO, he held senior level roles within Cessna Aircraft Company, leading greenfield operations while living in Chihuahua Mexico, and leading the integration of the Columbia Aircraft acquisition in Bend,Oregon.  As P&L leader for Unitech Aerospace, he oversaw an impressive turnaround. Withrow most recently held executive level roles at Kaman Aerospace, completing a multi-year turnaround of their aerospace composites businesses, and was board member for the Kineco/Kaman Ltd. JV, in Goa India. Mark is a United States Air Force veteran, with a Bachelor of Science Degree in Professional Aeronautics obtained from Embry Riddle Aeronautical University, and completed Textron’s Executive Leadership Development Series through MSU/OSU/UT. He is a certified Six Sigma Black Belt, Airframe and Powerplant Mechanic and has a private pilot license with multiple ratings.

Tawne Castorina

Chief Technical Fellow – Aerostructures Division

Tawne joined TIGHITCO, Inc. in July of 2005 as Engineering Manager. He was promoted to the position of Vice President of Engineering in 2009, and then to the position of Vice President and General Manger in 2012. His career includes roles at Indy Honeycomb, Bonded Technology and Lunn Industries. Tawne received his BS in Mechanical Engineering from the University of Connecticut.

Nedra Erysthee

Vice President Finance

As Vice President Finance, Nedra works closely with the executive leadership team to execute and achieve strategic initiatives. She joined TIGHITCO in August 2018 as the Financial Controller for the Charleston, SC facility and was promoted to Regional Controller for the AeroStructures Division in June 2019. This is where she led the Finance function and worked closely with operational leadership to achieve business objectives.  Nedra is a licensed Certified Public Accountant (CPA) and has over 15 years of audit and accounting experience.  Prior to joining TIGHITCO, she served as VP, Business Risks & Controls Manager for Citigroup/Citibank N.A. and VP, Audit Manager for Truist (formerly SunTrust) where she was recognized for her contributions, earning the organization’s prestigious Performance in Excellence (PEA) Award.  Nedra is a University of Michigan Alum, earning a BBA in Accounting and also holds an MBA from Strayer University, with an additional focus in Forensic Accounting.


Vice President of Human Resources

Amy joined TIGHITCO in 2009. As the Vice President of Human Resources, she is responsible for the direction of the Human Resources team, with responsibility for leading the HR strategy and execution within the organization. Amy is a seasoned business professional with over 20 years of in-depth experience. With a diverse background of HR leadership and management, she has worked within a variety of industries including education, public relations, legal and international manufacturing. Amy holds an Associates of Paralegal Studies and a Bachelor of Science in Human Resource Management from Western Kentucky University, as well as a Master of Business Administration Degree.

Jonna Palmer, IOM

Marketing Manager

With over 25 years of experience, Jonna is accountable for conceiving and executing marketing strategies and tactics that drive growth. Prior to joining TIGHITCO, she lead the account strategist team at No Joke Marketing, focusing on brands in childcare, financial services, specialty foods and CBD. Jonna previously worked for original equipment manufacturers, including Trane Air Conditioning, in growing market share and developing digital strategies. She focused on developing marketing programs for entrepreneurs while leading the marketing team at Advantage Media Group/ForbesBooks. Jonna holds a B.A. in Communications from Louisiana State University and the IOM designation from the Institute for Organization Management, a program of the U.S. Chamber of Commerce Foundation.

AeroStructures Division

Shawn Hawks

Vice President - AeroStructures

Noah Scherer

General Manager, Charleston

Noah has over 15 years of experience in the Aerospace Composites Industry.  He spent his formative years at Kaman Composites in Operations, Continuous Improvement, and Quality Leadership roles.  He graduated from Wichita State University with a Bachelors of Science in Industrial Engineering and Friends University with an MBA with concentration in Supply Chain.  With an extensive background in continuous improvement, he is also a certified Six Sigma Black Belt and holds a Theory of Constraints certificate from the University of Tennessee.  Noah’s focus is strategic and tactical deployment to drive sustainable growth for the Charleston facility.

Conrad Vinkels

General Manager, Berlin

Conrad currently serves as Vice President/General Manager of our Berlin, CT facility. He started working for Ellcott Manufacturing in 1994 which was purchased by TIGHITCO in 1997.  His career with the company started as a Manufacturing Engineer followed by multiple promotions over the decades. Conrad served as Engineering Manager then Materials Manger, Operations Manager, and Director of Operations before his recent promotion. He oversees the daily operations including planning and orchestrating monthly sales goals. Conrad has over 30 years experience in aerospace and previously worked for Kaman Aerospace and Bonded Technology.  He holds a BS in Mechanical Engineering from Northeastern University along with earning certificates including Continuous Improvement Champion Certification (CICC) from Connstep and ITO University through UTC.

Overhaul Support Services

Craig Zysk

General Manager

Craig has more than 3 decades of experience in the aerospace and defense industry. Prior to joining OSS-Division of TIGHITCO, Craig served as Vice President Global Sales and Marketing for Sunbelt Design & Development, where he worked closely with fixed and rotary wing customers across both military and commercial markets. Previously, Craig served as Director Global Sales with TRU Simulation a Division of Textron Aviation, Frasca International as Vice President New Business Development and prior to that as COO of Rotorsim Srl, a Division of Leonardo Helicopters in Sesto Calende, Italy.   Craig began his career at Sikorsky Aircraft where he had a 20-year tenure across several divisions, including eight years as a member of the senior leadership team in the MRO division. Craig earned a B.S. degree from Francis Marion College and a MBA from Sacred Heart University.  He is a member of the USHST (US Helicopter Safety Team) and has served on the ICAO (International Civil Aviation Organization).

Insulated Products Division

Humberto Santiago

Vice President and Chief Operating Officer MX (Chihuahua and San Luis Potosi, Mexico )

Prior to joining TIGHITCO in 2001, Humberto led or participated in the leadership of three manufacturing startups in Mexico, including two in the aerospace industry with Nadcap and AS9100 certifications. He has over 20 years of experience in the aerospace industry and his signature is in the incorporation bylaws of the Mexican Federation of the Aerospace Industry association (FEMIA). At FEMIA, he served as Vice President and Treasurer. Currently Humberto is an active Member of the Board. He has an MBA from Monterrey Tech in Mexico and other degrees from universities in Germany, Canada and Japan. Humberto is also able to speak German, English, Spanish, Japanese and Portuguese.

Chris Radcliffe

Vice-President and General Manager Engineering & Innovation Center

Chris has over 26 years of industry experience and joined TIGHITCO in 1995 advancing in the company through management positions such as Program Manager, Engineering Manager, Plant Manager, and Vice President of Technical Operations.  Chris has been key for advancing the product and tool design functions along with advancing innovation and technology through automation using CNC laser cutting and robotic welding production operations.  Additionally, he has created formal ERP process standards in key areas to ensure consistency and data integrity.  Prior to joining TIGHITCO, Chris worked in a variety of roles for Westinghouse Savannah River Company supporting nuclear materials production operations in the areas of equipment productive maintenance and spare parts for the Department of Energy.  Chris holds a Bachelors Degree in Mechanical & Aerospace Engineering from Rutgers University and a Masters Degree in Business Administration from Augusta State University.

Esther Altamirano

General Manager - San Luis Potosi, MX

Esther is a founding member of TIGLA SLP with 20 years of experience managing various areas. Areas include quality, manufacturing and customer service. She was responsible for initial certification in AS9100. Since 2013, Esther has full responsibility of facility’s P&L results. Over the years, she has selected, trained and challenged her team members while building a work culture based on company values. Her focus on teambuilding has resulted in a strong, diverse, empowered and accountable management team within facility. Esther holds a Bachelor in Industrial Engineering as well as a MBA from Instituto Tenológico y de Estudios superiored de Monterrey.

Victor Prieto

General Manager – Sheet Metal/Fabrication - Chihuahua, MX

After working in project management, production control and customer services positions, Victor joined TIGHITCO in 2008 as a Quality Manager. In 2011, he was promoted to General Manager. In the Chihuahua facility, Victor is leading the organization to ensure effective utilization of human and material resources, with the firm objective of customer service and satisfaction. He received his degree as an Electronics Engineer, Digital Systems from the. Instituto Tecnologico de Chihuahua. He and stays involved with the Chihuahua Migrants Friend Group and plays three musical instruments.

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