iconThe HOMER Energy Team

The core team that developed the HOMER software at NREL migrated along with the software code to HOMER Energy. In addition, the team adds new professionals with experience in renewable energy, software development, management, marketing, and entrepreneurial ventures.



Analysis and Training

Software Development and IT

Peter Lilienthal

Peter Lilienthal, Ph.D., Chief Executive Officer

Dr. Peter Lilienthal is the original developer of the HOMER® software and founded HOMER Energy in 2009 to enhance and commercialize the software. He has a Ph.D. in Management Science and Engineering from Stanford University. Peter has been active in the field of renewable and distributed energy and energy efficiency since 1978. Before founding HOMER Energy, he was president of Green Island Power, which provided analytical services for renewable and distributed power projects. From 1990-2007 he was Senior Economist with the International Programs Office at the National Renewable Energy Laboratory. His experience has included project development of distributed power projects, designing and teaching courses at the university level, and consulting to industry and regulators. His technical expertise is in utility modeling and the economic and financial analysis of renewable and distributed power projects. He was the lead analyst and one of the creators of NREL’s International and Village Power Programs. [top]

Marilyn Walker

Marilyn Walker, Ph.D., Chief Operating Officer, Director of Academic Relations

Dr. Walker is a serial entrepreneur and experienced technologist. She started her career in academia, earning a Ph. D in Biology from the University of Colorado and publishing over 50 technical publications on modeling and environmental analysis. In the university setting, she raised over 12 million dollars to make her programs financially sustainable and gained valuable knowledge in the fields of software, databases, modeling, and analysis. After 20 years in academia, she became an entrepreneur by purchasing, managing, and selling a successful business, PlayFair Toys. She founded and built two e-commerce companies, and has led multiple international and multidisciplinary teams. Dr. Walker brings her unique, in-depth experience in environmental systems and business operations to her role as COO. [top]

Howard Alt

Howard Alt, Chief Technology Officer

Howard Alt brings more than 20 years experience in software and systems to his position as the Software Project Manager at HOMER Energy. Over his career he has worked in businesses from startups to Fortune 500 as a software engineer, QA engineer, engineering manager, product manager, chief technologist, entrepreneur and CEO. [top]

Andy Kruse

Andy Kruse, VP for Business Development

For nearly 30 years Andy Kruse has been involved in international marketing, sales development of certification standards and public policy. As a co-founder of a Start-up clean-tech company in Arizona, he built Southwest Windpower into an internationally recognized brand within the clean energy industry which sold more than 180,000 wind generators worldwide. He has traveled to and worked directly with potential distributors in 72 countries. Later he joined Endurance Wind Power and established one of the first small wind leasing programs in the U.S. Most recently he worked as a consultant to a number of wind and solar companies in Europe where he has lived the last year.

Andy’s passion for international sales has been recognized numerous times by various agencies and trade associations over the years. He was awarded Exporter of the year by the US Export-Import Bank, the Small Business Administration and he received the President’s E award from the US Department of Commerce. The American Wind Energy Association also awarded him Small Wind Person of the Year in 2009. [top]

Diane Rieck

Diane Rieck, Accountant

Diane has long been involved and interested in the environmental sector and serves as HOMER Energy’s Accountant. She was a founding member of Wildlands Restoration Volunteers in Boulder, later taking over their accounting operations and in addition has worked with multiple local accounting clients over the last decade. Previously, Diane worked for American Express in New York City. She has an MBA from New York University and was an active volunteer for NRDC. Diane loves balance, a theme she sees compatible and necessary in both accounting and nature. She enjoys biking, hiking, gardening, knitting, cooking, reading, the list goes on and on… [top]

John Glassmire

John Glassmire, Director of Energy Engineering

John Glassmire is a globally-minded engineer who has worked across a wide-range of infrastructure projects. He has interests in sustainable design, renewable energy, project management, and international development. John’s undergraduate background is in mechanical engineering. After earning his BS from Rice University and his Masters from Northwestern University, he worked for 2 years at Sargent & Lundy, a major energy design and consulting firm in the US. Subsequently, John worked as a consultant in energy and water infrastructure at the Institute for Sustainable Futures in Sydney, Australia. [top]

David Rinck

David Rinck, Renewable Energy Engineer/C++ Programmer

David Rinck develops the analytical tools and methods within HOMER’s modeling engine. A mechanical engineer and C++ programmer, David's research and professional experience in data analytics and controls ranges from projects in solar thermal concentration to critical care medical devices. He has a strong interest in renewable energy, micro-grids and their potential impact in the developing world. He received his Master's in Mechanical Engineering with a concentration in energy systems at Columbia University, where he worked with the Earth Institute's Millennium Villages project. [top]

Jonathan Awerbuch

Jonathan Awerbuch, Energy Engineer

Jonathan supports the software development team by maintaining the quality, accuracy, and documentation of new releases of the HOMER software. Jonathan received the A.B. in Engineering Sciences and the M.S. in Mechanical Engineering from Dartmouth College in 2007 and 2009 respectively. He received the M.Eng. from Yale University in 2010. His fervent interest in the impending energy/environmental meta-crisis motivated publications and research including power electronic and ultracapacitor systems to improve electric vehicle efficiency, photovoltaic performance in the presence of output ripple and noise, and energy efficient electrothermal deicers, particularly for commercial wind turbines. [top]

Aleph Baumbach

Aleph Baumbach, Support Engineer

Aleph Baumbach graduated with two degrees: one in engineering (ABET accredited) and one in psychology from Fort Lewis College in Durango, CO. He believes that while engineering can help us improve the living systems and products that make our civilized world, that if we are to change to a more sustainable approach, change must arise from within. This is why he decided to pursue a double major in psychology – to study the inner human world – and engineering – to study how we can generate solutions to a variety of problems. As part of his interests in renewable energies, the environment, and sustainability, he served in the board of directors for the Environmental Center in Durango, CO for four years. He also was part of a project to bring potable water and a sanitation system for an indigenous village in Ecuador and in Laos with Engineers Without Borders. With his multi-cultural background, Aleph also speaks Spanish, Portuguese, and some German, which he uses to help HOMER’s customers worldwide with their technological issues as Support Engineer and Client Services Specialist. [top]

Linda Peirce

Linda Peirce, Web Developer

Linda graduated with a degree in humanities from Rice University in Houston. A jill of many trades, her professional background spans social work, technical writing, web development, database design, lactation consulting, and motherhood. At HOMER Energy, she works with the web development team and also manages the social media marketing for the organization. A native Texan, Linda moved to Colorado in 2005 and refuses to ever leave the beautiful mountains and 300+ days of sunshine per year that her adopted home state offers. Her passions include running, yoga, book clubbing, sun worshipping, refereeing arguments among her four children, and spending as much time in the beautiful outdoors of Colorado as possible. [top]

Michael Johnson

Michael Johnson, Director of Training

Michael's background encompasses more than 20 years of experience conducting analysis and managing projects related to all facets of the utility industry. This includes experience related to generation, transmission, distribution, energy efficiency, distributed generation, and renewable energy technologies. He is skilled in transforming research into actionable items that produce results for clients. In addition, he has been fortunate that his career has allowed him to utilize his passion to inspire and motivate others as a trainer and coach. This includes producing training manuals that received high satisfaction ratings from clients to creating the initial concept and program design for an Energy Efficiency 101 course. In all these endeavors, Michael realizes the importance of quality training and education so that participants receive full value from their learning experience. [top]

Rick Casey

Rick Casey, DevOps Support

Rick has been working in the software development field since 1992, but was always interested in computers, economics, social change and the energy field. His first degree in economics resulted in working in energy economics consulting for a time; but after witnessing the “PC revolution” first hand, was inexorably drawn more and more into programming, resulting in a degree in telecommunications from CU Boulder in 2002. Along the way he worked for a variety of software companies in the Denver/Boulder area, in software and database development, and devops support. Consequently, working at Homer Energy seems like the perfect culmination of his software career. Otherwise, he is often out enjoying the wonderful Colorado outdoors with friends, either hiking, camping, climbing, skiing or biking. [top]