Disruptive, Green Chemistry for Cost Effective, Sustainable Composites.

What We DoInnovation through green chemistry for cost-effective, sustainable composites.



TennEra is a biotechnology company specializing in efficiently separating highly renewable energy crops into pure fractions of lignin, cellulose, hemicellulose, and other extractives for use in a multitude of applications including pulp, biopolymers, specialty chemicals and advanced composite materials.


TennEra believes there is an intersection between cost-efficiency and environmental stewardship. We maximize value from renewable resources by focusing on core scientific principles and innovative technology.


  • Integrity
  • Environmental Stewardship
  • Team Work
  • Passion

Think Tank

Adam McCall, President/CEO

Adam has spent the last 14 years developing businesses in a wide variety of industries, concentrating on blending effective product development with brand creation. He has held numerous executive positions including Vice President of Product Development, Managing Director, and CEO. Out of Graduate School, he launched his career as a design engineer for a transportation technology start-up where he assisted the company in raising more than $500M in capital, moving into the position of VP of Product Development and being responsible for the design and production of the system which was deployed across the US. McCall helped the company grow from 10 employees to over 1300. In early 2008, he joined Malibu Boats as Director of New Markets Development, and was responsible for the creation and launch of a new boat brand, Axis Wake Research. Serving in the roles of Managing Director of Axis and Vice President of Product for both brands, McCall and his team assisted in growing the company from 22% market share (2008) to over 33% (2013) and positioned the company for its successful IPO in 2014.

McCall holds a B.A. from Maryville College, a B.S. in Mechanical Engineering from Tennessee Technological University, and an MBA from Tennessee Technological University. He joined TennEra and developed its business mission based on its early work with the University of Tennessee and Oak Ridge National Laboratory, aimed at the pursuit of developing sustainable composite materials from renewable sources. McCall was born on a dairy farm in Maryville, TN and is passionate about improving the lives of the rural community by way of TennEra’s advanced sustainable chemistry.

Don Naab, Senior Project Manager

Don has been managing projects within Fortune 500 companies in the petrochemical and forest & paper products sectors, as well as the U.S. Department of Energy and Department of Defense for over 20 years.

Don holds a B.S. from Rensselaer Polytechnic Institute in Chemical Engineering. His career started in R&D supporting the utility industry by developing methods of efficiently and effectively reducing sulfur emissions from coal-fired power utility facilities.  Don broadened his chemical engineering skills when he began supporting national clients in the pulp and paper industry as well as the specialty and petrochemical industries. More recently, Don supported the advancements in low cost composites at the U. S. Department of Energy’s Oak Ridge National Laboratory (ORNL), specifically supporting the Carbon Fiber Technology Facility (CFTF) and the Manufacturing Demonstration Facility (MDF).

Don has been an active participant in community service organizations for more than 15 years. Don served as the Director of Educational Programs for the national 2014 Medal of Honor Convention  and has a long history of service within the local Boy Scouts of America council and his church/diocese.

Barry Davis, Director & Chief Financial Officer

Barry Davis brings over 35 years of business experience. Prior to TennEra, he was a co-founder, Director and CFO of Genera Energy Inc., a leading biomass clean energy supply chain firm where he recently completed a capital raise. Mr. Davis has successfully raised capital, managed operations, and structured transactions, including a bond issue in excess of $200 million, designing 1031 Exchanges, led the acquisition of the Kidde Kat brand of infant apparel, negotiated an international joint venture between National Refining Corporation and SGM (Société Générale des Minerais) of Belgium. In addition he was previously a senior advisor to a leading laboratory in the chemical analysis of food, water and wastewater.

Mr. Davis is a graduate of the University of Tennessee and holds the CPA and CGMA designations.

Mr. Davis currently serves as a Director and Secretary-Treasurer of Hillcrest Healthcare Communities Inc. a 560 bed, 500 employee non-profit providing long-term and skilled nursing care to the East Tennessee Community and has held numerous positions as Board member and Director of local charitable organizations.

Core Technology Team

TennEra has developed a deep bench of consulting and advisory resources from key industry segments, representing more than 250 years of combined commercial sector chemical and materials science expertise. It is a team devoted solely to the advancement of TennEra's corporate mission. The TennEra Core Team has been carefully selected to provide vital insights needed to effectively guide the commercialization effort, and includes backgrounds from Industrial Biotechnology, Organic Chemistry, and Polymer Science and Technology. These human resources bring knowledge in lignocellulosic chemistry and materials, passion for their respective disciplines, and excitement for TennEra's vision.

Beyond the Core Technical Team, TennEra has engaged over 30 research scientists, Post-Doctoral researchers, and graduate research assistants through its portfolio of carefully coordinated sponsored research agreements. The tightly integrated team of collaborators was gathered from a variety of academic departments at The University of Tennessee, including the Center for Renewable Carbon, The Joint Institute for Advanced Materials (Civil Engineering), the Department of Chemical and BioMolecular Engineering and The University of Tennessee Space Institute. This group brings not only creative thinking to the possibilities, but state-of-the-art laboratories and instrumentation that will bring TennEra's vision to life. These talented, energetic academic scientists and engineers are a critical component of the TennEra team, working closely with the CTT to create the knowledge needed for continued advancement.

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