Our Team

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Our team is led by a talented group of energy professionals who combine their passion for stewardship of our planet with decades of knowledge and experience to deliver integrated solutions to energy efficiency and environmental challenges.

Larry Brand, President, Frontier Energy

Larry Brand



David Zabrowski, Vice President

David Zabrowski

Vice President


David Springer, Vice President

David Springer

Vice President


Richard Myhre, Vice President

Richard Myhre

Vice President


Steve Culbertson, Vice President

Steve Culbertson

Vice President


Jeremy Springer, Chief Financial Officer

Jeremy Springer

Chief Financial Officer


Community involvement

We exemplify our core values of Team, Relationships, Integrity, and Planet by giving back in the communities where we work. Our involvement includes:

  • Volunteering with the Union Rescue Mission
  • Adopting families for the holidays
  • Participating in the American Lung Association Fight for Air Climb
  • Donating commercial food service equipment to schools and non-profit organizations
  • Providing graphic design and web programming talents to local non-profits
  • Served as judges for the U.S. Department of Energy Solar Decathlon
  • Staff serve on boards of directors for a variety of organizations including environmental, fine arts, music, education, health, and philanthropic causes


Build It Green
California Association of Building Energy Consultants
California Efficiency + Demand Management Council
E3T Connect
Efficiency First
Emerging Technologies Coordinating Council
North State Building Industry Association
Northern California Solar Energy Association
US Green Building Council
Fuels Institute
Sustain OC
San Ramon Chamber of Commerce
West Sacramento Chamber of Commerce


Frontier Energy, Inc. is a subsidiary of GTI International, Inc. (GTII). GTII is a holding company and wholly owned subsidiary of Gas Technology Institute, a leading non-profit research, development and training organization serving the energy industry for more than 75 years. Through GTII, Gas Technology Institute is investing in an efficient, clean energy future to meet ever-escalating energy, operational, and environmental challenges.

On January 1, 2017, Fisher-Nickel, Bevilacqua-Knight (BKi), and Davis Energy Group merged to become Frontier Energy, Inc. Backed by the strong reputation and legacies of its predecessors, as well as the technical expertise and partner network of ultimate parent company Gas Technology Institute— Frontier Energy will leverage decades of experience to deliver value and differentiate our knowledge-based offerings.

Larry has served as a GTI R&D Director, Energy Delivery & Utilization and President of Davis Energy Group. He has over 30 years of experience in the energy industry, working extensively in building thermal performance, energy conservation in buildings, high-efficiency space conditioning systems, and codes and standards development. He has responsibility for planning, securing funding, managing, and performing on projects related to energy efficiency in space conditioning hardware and buildings.

Larry has recently worked with the Department of Energy/National Renewable Energy Laboratory – Building America program, conducting research into high efficiency equipment performance, energy efficiency measures and packages, whole home performance, and distribution systems. With California Energy Commission – Public Interest Energy Research (PIER) and Electric Program Investment Charge (EPIC) funding, he has led the radiant HVAC systems project, Measured Home Performance program, commercial foodservice energy savings, combined heat and power, Zero Net Energy, and residential IAQ and healthy homes projects.

David Zabrowski leads Frontier Energy’s Commercial Food Service division and is the manager of PG&E’s Food Service Technology Center (FSTC) Energy Efficiency Program. He directs the FSTC’s testing, education, and customer outreach activities; provides technical expertise and oversight for test method development and application; and provides guidance to PG&E management responsible for the FSTC program on the center’s growth and direction. During his 24-plus year tenure, David has overseen the development and maintenance of more than 40 test methods under the jurisdiction of the ASTM F26 Committee on Food Service Equipment, which forms the basis for government and utility programs that drive higher energy performance within the commercial food service industry.

In addition to managing the FSTC, David interacts with industry stakeholders to create new opportunities for energy utilization optimization within the food-service sector through utility and government sponsored programs and industry collaboratives. This effort has been a major catalyst for change in the industry, opening new markets for energy initiatives.

David holds a B.S in Electrical Engineering from the California Polytechnic State University.

David Springer manages Frontier Energy’s Building Research & Energy Consulting division, providing oversight of technical projects. David has worked on demand-side and renewables R&D projects, technology development and market transformation, mechanical design, commissioning, performance monitoring, energy standards, and emerging technology training. Since the mid-1980s, he has participated in projects to update California Title 20 and Title 24 standards. In recent years, he has become increasingly involved with zero energy projects, including U.S. DOE’s Zero Energy Homes program.

Other significant management experience includes the ground-breaking Advanced Customer Technology Test for Maximum Energy Efficiency (PG&E’s Advanced Customer Technology Test for Maximum Energy Efficiency – ACT2), the California GeoExchange Project, the PIER-funded Alternatives to Compressor Cooling project, and the Alliance for Residential Building Innovation (a U.S. DOE Building America program team.

David has authored eighteen papers and articles about energy subjects and holds six patents. He is an active member of ASHRAE, serving as a voting member of TC 6.5 (Radiant Heating and Cooling) technical committee. He is also a member of the UC Davis Mechanical and Aerospace Engineering Board of Advisors and of the California Technical Forum, which provides technical guidance on California’s integrated demand side management portfolio.

David earned his B.S. from the University of California, Davis in Biological Science.

Rich Myhre leads Frontier Energy’s Transportation and Power division. His work ranges from strategic planning, budgeting, and team building for public-private research collaboratives to multi-disciplinary research results synthesis, stakeholder/policymaker communications, and public outreach. Clients appreciate Rich’s insights into their programs and his ability to communicate their work to diverse audiences. He blends a reporter’s inquisitiveness and writing skills with an engineer’s technical understanding and an investor’s nose for business opportunities and risk management. Rich also leads new company initiatives in grid-connected energy storage, and he oversees work in zero-emission vehicles and infrastructure.

Rich has developed technology roadmaps to guide R&D conducted by the Electric Power Research Institute, the California Energy Commission, and others. He has co-authored numerous documents, from business plans and congressional testimony to journal articles, white papers, and technical reports. He has planned and facilitated leadership retreats, technical workshops, and community meetings.

Rich earned an M.A. in Energy and Resources from the University of California at Berkeley and a B.S in Mechanical Engineering from the University of Wisconsin. He is a registered professional engineer in California.

Steven Culbertson has a record of success leading cross-functional teams in the design, development, and implementation of complex projects completed on time and under budget. With a combination of aerospace and electric utility program management experience, he brings a unique set of management and technical skills to each project. He has more than 17 years of experience in management of residential and commercial demand-side programs in the utility industry. And he has 30 years of experience developing and managing project cost and schedule, scope and resources, and overseeing the formal planning, tracking, and reporting of project performance.

As the head of Frontier Energy’s Demand Management Services division, Steven led staff and subcontractors in the design and implementation of Energy Upgrade California in Los Angeles County, a $35 million effort leveraging funding from the U.S. Department of Energy and the California Energy Commission.

Steven was instrumental in assisting Los Angeles County in proposing and being awarded the continuation of Energy Upgrade California in 2013-2014 under the newly formed Southern California Regional Energy Network (SoCalREN). This award is currently valued at $44 million, and Frontier Energy remains the prime contractor for the Energy Upgrade California portion of SoCalREN activities. Steven holds an M.B.A. from the Drucker Graduate Management Institute at Claremont Graduate University in California and a B.S. in Economics from California State Polytechnic University in Pomona.

Jeremy Springer oversees the company’s overall financial position, compliance, and project budgets. He also performs systems development and project management activities. Prior to working with Frontier Energy, Jeremy spent two years with Moss Adams LLC, where he performed audit and assurance services for mid-sized government contractors, distributors, and software service providers. He led the development of several software applications which allowed clients and internal users to streamline processes and improve overall operations.

Jeremy graduated California State University, Sacramento with a B.S. in Business Administration, Accountancy.