OUR TEAM


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Ron Eller

President & CEO


Ron was appointed President of Tinuum in January 2014, and CEO in March 2016. Prior to joining Tinuum, Ron was a director

and later President and CEO of Ascent Solar Technologies, a thin film photovoltaic manufacturer, from 2009 to 2012. He previously held senior executive positions over a 14 year period at Hewlett-Packard Company and Compaq Computer Corporation. Ron holds a B.S. degree in Professional Aviation Technology from Purdue University, and an M.S. degree in Business from Colorado State University.
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Rick Dowd

SVP & Chief Financial Officer


Rick has been Tinuum’s CFO since January 2015. He has been CFO of private and public companies in

the financial services, utility, telecom, and manufacturing industries. Prior to joining Tinuum, Rick was CFO of Cadre Services, a proppant mining company for the oil and gas industry. He also spent 10 years with Denham Capital Management LP, a private equity firm that invests in power, energy and mining. Rick has a B.S. degree in Industrial Distribution from Clarkson University and an M.B.A from the Sloan School at MIT.
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Jim Walter

SVP, Operations & Engineering


Jim was appointed SVP of Operations & Engineering for Tinuum in February 2016.

He has more than 25 years of experience in Operations, Manufacturing, and Logistics across multiple industries. Prior to joining Tinuum, Jim managed production and manufacturing facilities for Mallinckrodt Pharmaceuticals and its predecessor companies. Early in his career, he oversaw the management of nuclear power plants on a Guided Missile Cruiser for the US Navy. He holds a B.S. degree in Mathematics from the United States Naval Academy.
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Michelle Williams

SVP Human Resources


Michelle became Tinuum’s SVP of Human Resource in April 2015. She has more than 20 years of

experience in Operations and Human Resources across multiple industries. Michelle has been on the executive HR team at Express Scripts supporting Operations, Supply Chain, and all domestic and international Subsidiary business units. She served as VP of Talent Management at Centex Homes and held leadership roles at the Walt Disney Co. in Operations and Human Resources. She holds a B.S. degree in Business Administration from the University of Central Florida.
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Jim Zerefos

SVP & General Counsel


Jim has been General Counsel and Secretary for Tinuum since April 2012. Before joining Tinuum,

Jim held leadership positions since 1997 in the legal groups of Fortune 500 companies in Colorado. Most recently, Jim was Vice President, Law at Qwest Communications, where he was responsible for legal support for M&A, treasury, real estate, procurement, and other strategic transactions. Prior to moving to Colorado, Jim was in private practice with several firms in Ohio and served most recently as a partner with Thompson Hine. Jim received his J.D. and a B.S. in Management from Case Western Reserve University.

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Randy Dietrich

SVP Business Development


Randy was appointed SVP of Business Development of Tinuum in March 2017.

Randy is also CEO of Republic Financial Corporation since 2008 and a member of the Tinuum Board since 2011. He began his career as a Certified Public Accountant working for Coopers and Lybrand. Randy holds a B.S. degree in Accounting from Wittenberg University.
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