What others are saying...

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"We have been working with Cornerstone Systems to handle all our internal auditing for the last 5 years and they have been nothing short of excellent in helping us achieve and maintain our AS9100 certification. Jeff and Lisa are knowledgeable, honest, and extremely resourceful in all aspects of the standard. Their reporting is thorough and clear and has often been praised by our AS9100 auditors. With their support and partnership, our audits and quality management system have been vastly improved with the reassurance that we are constantly moving in the right direction."

~ Peter Harper, COO, IBC Coatings

"We have been working with Cornerstone since 2021 – Jeff and his company have guided us through a number of ISO quality audits with zero issues. He makes us be accountable and proficient. By working with Cornerstone A.E.D. is more profitable. Starting late 2024 Jeff will begin development of a new quality system for our sister company Boyce Industries."

~  Al Lowe, President, A.E.D. Metal Products

"I’ve been in the Aerospace Industry for 27 years and started to run across Jeff’s work at clients while performing 3rd party audits to AS series standards. I immediately was impressed with his work and how he customized the tools implemented into client’s management systems to fit their needs and requirements. Since then, I have audited many clients where Jeff @ Cornerstone has helped them improve or implement a full management system and continue to see consistency, improvement, and value in their work. I highly recommend Cornerstone to any clients who are seeking compliance and/or improvement and to add value to their QMS."

~ Michael Abbott – AIEA AS9100/9120 / ISO9001 / FAA0056 Lead Auditor

"Jeff has been a valuable asset to Brennan in getting all our global manufacturing sites in the US, UK, and Canada certified or maintaining our certification to the AS9100 standard.  He brings a value-added approach to his auditing by ensuring we meet the AS9100 requirements as well as providing observations on how we can enhance our quality management system based on his knowledge, experiences, and involvement in the aerospace industry. Brennan appreciates the work Jeff has done for us."

~ Bill Poduska, Quality Assurance Manager, Brennan Manufacturing Group

"Statt Engineering successfully achieved AS9100 certification thanks to the invaluable guidance of Jeff and Lisa Rybolt at Cornerstone Systems. Their expertise in quality management systems and deep understanding of the aerospace industry have been instrumental in our journey. Jeff and Lisa provided clear & concise training, supported us in developing robust procedures, and helped us implement and embrace a system that not only met the requirements of AS9100 but also improved our overall efficiency. We highly recommend Cornerstone Systems to any organization seeking to achieve and maintain AS9100 compliance."

~ Bobby Stines, President, Statt Engineering

"Jeff worked collaboratively with our team, offering guidance and support as needed. His suggestions went beyond mere compliance, helping us enhance our overall quality management system. I can always count on him to provide valuable insights and recommendations for process improvements."

~ David Warner, Quality Manager, Arnold Magnetics/Ramco Electric Motors

"I am writing this letter to thank you for working with our company to set up an AS9100 compliant quality system on a very tight schedule. You made sure our system met every requirement, and you made insightful and practical additions which make our system run smoothly and efficiently. Your visit to our site pre-audit helped us to clean up any remaining questions, and we ended up with no non-conformances after our audit! Your continuing help has been invaluable to keeping us on track and focused on maintaining our quality while we grow.

Many thanks for all your help. We couldn’t have done it without you!"

~  Valerie & Allen Hall, Owners, Weather Guard Lightning Tech

"Jeff did a great job of managing the certification for my new FAA 145 repair station, from creating a custom system of manuals and forms, to working with the FAA through the audit process. I continue to utilize them for compliance and improvement of our systems. Having owned and operated a Repair Station since the 1970’s, utilizing Cornerstone's expert support has been very helpful in navigating the current FAA." 

~  Randy Keeker, President & Founder

"Jeff serves as our Quality Manager, representing us in negotiations with our vendors, as well as guiding our staff through the product realization process from a quality and compliance perspective.  He is quick to jump in and help problem solve or implement tools as we navigate new levels of the product manufacturing process.  His breadth of industry experience, his knowledge of quality management systems, and level-headed approach have been invaluable to our team. 

In addition, we utilize Lisa to conduct our internal audits.  She is extremely thorough, provides insightful feedback and is always timely in her deliverables.  Oftentimes her audit is more detailed and rigorous than our registrar audit, which is exactly what you want in an internal auditor.  I am always happy to recommend Jeff & Lisa to anyone looking for quality consultants."

~ Amy Wortman, Director of Business Ops, Wolf Technical Services