Management Team

The Rootstock Management Team brings together decades of industry experience and software innovation to deliver the leading SaaS manufacturing enterprise software serving mid-sized discrete manufacturers.


Pat Garrehy – Founder, President, CEO and Board Member

Pat Garrehy is the Founder, President, and CEO for Rootstock Software® and has an extensive background as a software architect and engineer. With over 30 years of management, sales and technical experience, Mr. Garrehy brings a unique blend of analytical focus and business savvy to the table.

As CEO, Mr. Garrehy has applied his extensive background to the development of Rootstock’s nimble and powerful cloud based (SaaS) solution. In addition, Mr. Garrehy sets the company’s strategic direction and provides overall leadership for the entire management team. He has developed and maintains close relationships with strategic partners and

Mr. Garrehy is also the founder and former CEO of Relevant Business Systems, a client-server ERP software provider with an exclusive focus on discrete manufacturing companies. Relevant, which was sold in 2006, remains the most profitable division of the acquirer to date. The software is currently utilized in a number of business operations, including major divisions of Lockheed and Solectron with sales of over one billion dollars.

As a University of California at Berkeley graduate, he holds a BS degree in business and mathematics as well as a MBA in finance from the University of Southern California.


Chuck Olinger – COO & Senior Executive Vice President

Chuck Olinger is the Chief Operating Officer and Senior Executive Vice President for Rootstock Software. Mr. Olinger directs Rootstock’s strategies for growth while expanding customer and partner relationships. With over 35 years in the development, sales, marketing, and implementation of manufacturing systems, Mr. Olinger provides extensive knowledge regarding today’s market and current buyer trends.

With recent experience managing the transition of an established ERP offering to the SaaS model, Mr. Olinger brings with him a strong management background coupled with a distinctly practical vision regarding the future of elevated manufacturing solutions.

Mr. Olinger has held senior management positions at numerous other technology organizations including, Martin Marietta Data Systems, TRW, nMetric LLC, Relevant Business Systems and MCBA.


David Stephans – Senior Vice President Worldwide Sales and Channels

As Rootstock’s Chief Customer Officer, Dave Stephans directs and manages all customer solution architecture and customer acquisition activities. With over 20 years of manufacturing and technology experience and a proven track record of taking the customer experience to new levels of productivity and profitability, Dave has an extensive background in manufacturing and supply chain optimization that when coupled with Rootstock’s product depth and breath, delivers a formula for success for Rootstock customers.

Prior to Rootstock, Stephans was the General Manager of an Aerospace & Defense government subcontractor that manufactures advanced electronic products. Dave managed the company’s operations through a period of high growth, complex customer demands, and significant compliance requirements. With his deep understanding of manufacturing systems from both the buyer and seller perspectives, he brings great insight and leadership to Rootstock.

Stephans has held numerous senior management positions with firms such as Baan Supply Chain Solutions, i2 Technologies, and Relevant.

Dave is a graduate of Northern Illinois University with a BS in Operations Management and Information Systems.


Dean Hettenbach – Vice President of Client Services

Dean Hettenbach is Senior Director of Professional Services for Rootstock Software. Mr. Hettenbach joined Rootstock in 2010 with an extensive background in manufacturing management and system solutions development. Mr. Hettenbach is primarily responsible for overseeing and implementing key measures and strategies in Professional Services to increase the level of service provided to Rootstock’s customers. From implementation to training and system upgrades, Mr. Hettenbach and his team pride themselves on being responsive, available, and proactive to their customers’ short-term and long-term needs.

During his 25 years in the manufacturing sector, Mr. Hettenbach has supported a variety of clients ranging in size from Fortune 500 to start-ups and emerging growth companies. His experience spans multiple industries including electronics, consumer packaged goods, contract manufacturing, pharmaceuticals, composites and third party logistics services. Dean Hettenbach has established a distinguished reputation as a manufacturing systems user, purchaser, developer, and manager. His extensive background and unique user-focused approach position Mr. Hettenbach as a leader in system implementations.

Mr. Hettenbach received his Bachelor’s degree in Industrial Engineering from the University of Missouri, and his Master’s degree in Industrial and Systems Engineering from the Georgia Institute of Technology. He also holds a certificate in Computer Integrated Manufacturing Systems from Georgia Tech and is an active member of APICS and the Technology Association of Georgia.


Samuel Wood – Vice President of Software Engineering

Sam’s background includes over 25 years of software design and development in manufacturing and accounting systems. Prior to joining Rootstock, he spent over 20 years at Relevant Business Systems (an ERP software provider) most recently serving as the Director of Product Development where he was responsible for the product roadmap and release process for the past several years. Serving as both a software architect and developer he produced and maintained several of the systems key modules including Service and Repair, WBS Contract Billing, Rate Pool Management and Hazardous Material Tracking. Sam is a graduate of Heald Business College.


Lance Ford – Senior Director of Technology

Lance’s background includes more than 20 years experience in software development with responsibility in all levels of systems development and implementation. Prior to Rootstock, Lance served as a Software Development Manager at Valley Oak Systems, a provider of Claims Management and Bill Review Software. Lance was responsible for building and managing the team to develop the next generation of the company’s products.

In addition to his work at Valley Oak Systems, Lance served as Software Development Manager at KnowledgeTrack, a provider of e-infrastructure software for portals and advanced business applications. Lance led the technical team for design, development, and implementation of KnowledgeTrack’s e-infrastructure software and core APIs of the J2EE platform. Previous to KnowledgeTrack, Lance has held various software development roles at Bank of America, DFS Corp(Duty Free Shops), McKesson Corp, and Safeway Stores, Inc. Lance graduated from the California State University Hayward with a degree in Computer Science.