Rick was a pioneer in the computer hardware integration industry Co-founding his first company in 1977.

As the President/CEO, Rick co-founded RAVE Computer Association in 1988. RAVE Computer specializes in purpose- built, high performance Computing. It has been a Defense contractor since 1992. Mr. Darter currently helps lead the strategic direction of the company as its Co-founder and CEO.

Mr. Darter is the current President of National Defense Industry Association – Michigan Chapter. He joined NDIA in 2012 and has served in various capacities including Chair of the STEM and Finance committees, and as their Secretary-Treasurer.

Mr. Darter has served on the Board of Directors for several non-profit organizations including Automation Alley. He organized and served as Chair of their Modeling, Simulation, Visualization, and Immersion committee.

He served as a Director and is on the Policy Committee of the National Modeling and Simulation Coalition based in Virginia. NMSC is an affiliate of the National Modeling and Training Association.

Mr. Darter is a founding member as well as a Board Member of the RAVE CAVE at DC3S. RAVE CAVE is a 3-D immersive center for automated virtual environments that promotes Modeling, Simulation and Visualization in education and industry.

Sara Blackmer


Sara’s leadership touches every department at RAVE, ensuring quality, communication, and continuity. Her past experience in business strategy development and execution in defense and other federal markets prove invaluable to the growth of RAVE.

Previously in her career, she was the Director of Government Markets for Pratt & Miller Engineering, Director of Defense Development for the Michigan Economic Development Corporation, and an Associate for Booz Allen Hamilton.

Sara was awarded the Horizon Industry Award for Business Development from the Women in Defense Michigan Chapter. She served on the Executive Board of Directors for the Robotics Technology Consortium (RTC) from 2012-2014, and helped to convert the RTC to the National Advanced Mobility Consortium (NAMC). She currently serves on the University of Michigan M-TRAC Transportation Executive Board and Oakland University’s School of Engineering and Computer Science Executive Board of Advisors.

Sara has served 16 years in the United States Air Force as an Aircraft Maintenance Officer, and currently serves in the United States Air Force Reserves at the Officer Training School in Maxwell Air Force Base, Alabama. Sara is also certified in defense acquisition logistics and test and evaluation through the Defense Acquisition University. She has earned a BSE Cum Laude in Naval Architecture and Marine Engineering from the University of Michigan, an MBA and an MS in Global Supply Chain Management from Indiana University, and earned her Project Management Professional Certification in 2009.

Sara is married and a mother of three children. In her very limited free time, she enjoys to read.

Karl Rosenberger

Director of Product Development

From dog lover to electronic circuit and software program designer, Karl Rosenberger with 30 years of computer industry experience is known for figuring out the cause and solution to technical issues that escape the other guy. He gets to the root of a client’s need by designing RAVE optimized computers for nearly any task and tackling thermal issues, acoustics/noise, unique form factor needs and other problems customers face on a daily basis. In 2009, Mr. Rosenberger led the RAVE Computer team in building a short-depth, quiet 2U image generator that won the Intel 2010 “Most Innovative Reseller Partner of the Year” in the Server/Workstation category. In his spare time, Karl enjoys playing and recording music as well as spending time with his wife Anita as they care for their fostered Siberian Huskies.


Mark Witulski

Director of Manufacturing

Known for his superior ability to remember all types of computer systems, troubleshoot and diagnose incompatibilities; Mark Witulski is RAVE’s manufacturing director building high-quality systems and never sacrificing quality of work to take the easy route. With more than 19 years of computer manufacturing experience, Mr. Witulski works as a team with other RAVE departments to consistently deliver quality systems and the best possible solution to each customer. Mr. Witulski graduated Magna Cum Laude from Walsh College and earned degrees in business management and computer information systems.