About Us


Beyond Efficiency empowers people to create enduring human-centered buildings. Our vision is a world where everyone lives, learns, works and plays in a built environment that nurtures human potential and secures ecological health.


Beyond Efficiency is a nexus for ideas, innovation, knowledge and partnerships in the sustainable building industry. The foundation of our work in building consulting, research and education provides us hands-on experience and unique insights to allow us to understand the real hurdles faced by stakeholders in creating great projects. This foundational work informs and strengthens our work in program development, policy support, knowledge and technology transfer, allowing us to scale solutions and accelerate impact.

Our BIG BOLD goal is to demonstrate use of creativity and technology to solve a significant industry challenge. Stay tuned!


Super-efficient buildings are critical to ensuring we hand off a planet ready to embrace and sustain future generations. When focusing on efficiency, it's important not to get blinded by isolated components and neglect the ultimate goal of optimizing the entire system—from the building to the site, community and beyond. After all, elements of a building are only as efficient as the larger systems they comprise.

Yet a truly successful building—one that's loved and stands the test of time—transcends efficiency. It is healthy, comfortable and filled with natural light; it feels good, improves people’s well-being and allows them to thrive. It has thoughtfully designed spaces that are smart and functional. It considers and connects to nature and the community.

Efficiency is vital, but without these intangible and "beyond the lot line" human elements a building will not endure (so much for efficiency!). Buildings are for people, and they must be loved to endure. This is the premise of our philosophy and approach.  

        - Katy Hollbacher, Founder and Principal of Beyond Efficiency


Katy Hollbacher, P.E., Principal + Founder

Katy Hollbacher - Beyond EfficiencyKaty is a licensed civil engineer and founded Beyond Efficiency in 2009 to provide technical consulting services for high-performance building projects, something that was sorely lacking in the marketplace. She has twenty years experience in the A/E/C and green building industries and is passionate about educating clients and team members on building science and best practices.

Prior to founding Beyond Efficiency, Katy spent five years managing Build It Green's suite of technical information programs, including the Ask an Expert green building hotline and Best Builders technical assistance program. She was also an engineer at Wiss, Janney, Elstner Associates, a national consulting firm specializing in the forensic investigation and repair of modern and historic structures. At home in the field as well as the office, Katy has pounded nails, hung drywall, and pulled wires on various construction projects.

She has presented for a broad range of clients including AIA, PG&E, ACI, West Coast Green, Structural Engineers Association of Northern California (SEAONC), and NARI as well as various public agencies, USGBC and Passive House chapters. Katy was a founding board member of the non-profit Passive House California and holds a Master of Science in Civil/Structural Engineering from the University of Michigan.

Katie Dahlgren, Project Success Manager

Katie Dahlgren - Beyond EfficiencyKatie holds a Bachelor of Science in Civil Engineering from Washington State University Honors College and brings 10 years of construction management experience to her role at Beyond Efficiency. She enjoys diving into the details and working with diverse teams to effectively meet client goals. Katie's core role is to support the team's project management needs and facilitate abilities of technical staff to efficiently and effectively fulfill contracted work scopes. 

Prior to joining Beyond Efficiency Katie worked with Big-D Construction - Signature Group and McCarthy Building Companies, working with clients to build their vision with design-build teams. Key roles included cost estimator and project manager on projects ranging from parking structures in Southern California to high-end custom homes in Jackson, Wyoming. Katie has served as a board member of USGBC Wyoming and an advisory board member to Teton County Integrated Solid Waste & Recycling, contributing to the county's Zero Waste Resolution through input on facility planning.

Danielle Beevé-Morris, Sustainability Engineer Manager

Daniell Beevé-Morris - Beyond Efficiency

Danielle holds a Bachelor of Science in Bioengineering from UC Berkeley (Go Bears!) as well as a Master of Science in Environmental Engineering Planning & Management from Johns Hopkins University. Within the last few years she has been excited to make the switch from the Biotech industry to the Environmental Sustainability sphere, and she brings with her a strong background in project management, process improvement, and regulatory compliance at both the national and global levels, having worked in renewable energy in London immediately prior to Beyond Efficiency.

A self proclaimed Tree Hugger, she is passionate about finding environmentally just solutions to the climate crisis, and is an active member of Al Gore’s Climate Reality Leadership Corps. As such, she is thrilled to be working with a team that holds similar values: working together toward a more sustainable future for all.  

Theo, Zen Master (2001-2014)

In Memoriam
Theo was with Beyond Efficiency since before its beginning. After spending a year in the Animal Shelter of the Wood River Valley in Hailey, Idaho, Katy brought him home to Wyoming in 2003, where he spent many months hanging out at a jobsite--the perfect place for a dog learning to be house trained. There, and later at Build It Green, and then at Beyond Efficiency, Theo's primary responsibility was office morale booster.

Theo believed that sun feels good and reminded us of the importance of bringing the outside in. And of getting outside to breathe fresh air, explore interesting scents, and run free through the woods and waves. In a nutshell, to enjoy every moment. Humans could learn a lot from wise old dogs.

Theo had a pure and gentle soul and made me a better person. I will miss you dearly, my sweet Theo.

Jennifer Love, Multifamily Director

Jennifer holds a Master of Science in Environmental Engineering from Clemson University and has technical expertise in many facets of green building, from stormwater management and rainwater harvesting to indoor air quality and materials. She is especially interested in water conservation and quality and was involved in Water-Energy Nexus research at a prior job. Jennifer is a Certified GreenPoint Rater and Certified Energy Analyst and has completed an array of professional Passive House training courses. 

Prior to coming on board with Beyond Efficiency, Jen worked on educational programs for the Pacific Energy Center for four years. She also worked at Build It Green, where she counseled building professionals through the Best Builders program, answered hundreds of Ask an Expert hotline questions, and contributed to the development of the now far-reaching GreenPoint Rated program over her four-year tenure.

Laken Rush Allen, Operations Manager

Laken Allen - Beyond EfficiencyLaken holds a Bachelor of Arts in Public Relations from the University of North Carolina at Chapel Hill, and brings a diverse background in event planning, customer relations, project management and interior design to the Beyond Efficiency team.

She enjoys streamlining processes and supporting the staff in creating enduring, human-centered buildings. In her role, she oversees day to day operations and administration to allow the technical staff to focus on the big picture. She coordinates recurring and special events and facilitates marketing efforts. She also manages the hiring process, on boarding and continued staff education.

Prior to Beyond Efficiency, Laken worked in interior design where she realized her affinity for problem solving and detail oriented project management could also serve her passion for sustainability. She is thankful for the opportunity to work with teammates equally as excited to create a better planet.

Nathan Iltis, Energy Engineer Manager

Nathan Iltis - Beyond Efficiency

Nathan earned his Master of Science in Civil & Environmental Engineering at Stanford University. His focus program was Atmosphere & Energy, and his coursework detailed solutions to the climate crisis. He assisted in teaching Energy Efficient Buildings and Renewables & Efficiency. Nathan seeks to understand how best to reduce emissions in buildings across the country, whether by employing new efficiency techniques, deploying data science and new technologies, or supporting new codes and standards that minimize emissions. He currently assists in energy modelling for buildings of all sizes and ensures clients’ buildings achieve strict green building standards.

Prior to Beyond Efficiency, Nathan managed energy data in California schools, and was also a structural engineer in Colorado and Alaska. Having grown up at an outdoor leadership camp in northern Wisconsin, he learned the value of treating the planet and people well early on. His love of a quality lifestyle motivates him to master the best techniques for creating highly habitable buildings for others, and he is very thankful to be surrounded by teammates that support this mission wholeheartedly!  

Nate Russell, Energy Engineer

Nate Russell - Beyond EfficiencyNate holds a Master of Science degree in Mechanical Engineering and a Bachelor of Science degree in Aeronautical Engineering, both from Rensselaer Polytechnic Institute. Throughout his life he has been involved in many construction projects from simple remodels to full-gut rehabs and new construction. Two highlights include designing and executing a full rehab of a 1910 home that included a deep energy retrofit that yielded about 70% energy savings and designing and building a modest size, high-performance home that achieved a HERS score of 39. He looks to draw upon that firsthand construction experience and technical background to facilitate the adoption of high-performance buildings and practices.

Prior to joining Beyond Efficiency, Nate was a project manager at the New York State Energy Research and Development Authority in the Buildings R&D group focusing on HVAC technologies with a heavy emphasis on solid biomass combustion systems.

Dan Johnson, AIA, Sustainability Architect Leader

Dan is a licensed architect and holds a Master of Architecture degree from the University of Washington, which included a Valle Fellowship to study building technology at the IVL Swedish Environmental Institute in Stockholm. Dan also earned degrees in Conservation Biology and Anthropology from UW and is an alumnus of the International Honors Program for comparative foreign study. Dan is a leader that inspires camaraderie and team integration to meet project objectives. Recognized as an expert on sustainable buildings and early-design energy modeling, Dan enjoys creative problem solving and using his broad skillset to bridge gaps between architects, engineers, owners, and contractors.
Prior to joining Beyond Efficiency, Dan led projects through all phases of design in the K-12 Schools studio at Ratcliff Architects, and worked as a designer and project manager at Arkin Tilt Architects. With Dan's leadership, the firm undertook one of the first Passive House, net-zero-energy homes in the Bay Area, which used many reclaimed materials and received several design awards and green certifications. Dan also brings his experience from the Integrated Design Lab in Seattle, where he consulted on daylighting for commercial and educational buildings.

Kara Rousselle, P.E., Mechanical Engineer Leader

Kara Rousselle - Beyond Efficiency

Kara holds a Bachelor of Science in Architectural Engineering with a mechanical emphasis from the University of Wyoming. She is a licensed Professional Engineer, Certified Energy Manager, and LEED AP BD+C. After building a home in Driggs, Idaho, she realized there has to be a more efficient way to build. With some research, she discovered the Passive House standard and went through the training to become a Certified Passive House Consultant.

Prior to Beyond Efficiency, Kara worked at mechanical consulting firms in Monterey, CA, Jackson, WY, Idaho Falls, ID and Boise, ID. She also worked for a mechanical/electrical contractor in Jackson, WY. She is equally at home in the office or on the job site. She has designed commercial, industrial and high-end residential projects encompassing a wide range of project types with plumbing, sheet metal, and hydronic systems including geothermal heat pump systems, air to water heat pump systems, central air handlers with VAV reheat, and boiler systems with radiant floor heat, fan coils and snowmelt. 

Nicole Prater, People Success Manager

Nicole Prater - Beyond EfficiencyNicole holds a Master of Science in Public Policy and Management from the University of London and brings over fifteen years experience in the non profit and public sectors working to address several of the problems facing society. She is thrilled to be at Beyond Efficiency where she can put her experience to the task of tackling the climate crisis.

Nicole's role at Beyond Efficiency is all about supporting the talented, creative and hard working team in order that the company have as large of an impact as possible.

Annette Hartsfield, Contracts + Financials Support

Annette Hartsfield - Beyond Efficiency

Annette holds a Master of Anthropology from San Francisco State University and has worked in office management and development most of her professional life. She spent seven years at Build It Green in various roles, starting as the office administrator and ending as senior project manager in the marketing and communications department, writing and editing much of the organization’s newsletter and web copy.

Annette left the green building industry in 2013 to be a full-time parent and household manager. Now that her boys are both in school, she is happy to bring her capacity for order and meticulous detail to Beyond Efficiency’s operations team by assisting with insurance, contracts, monthly invoicing and other accounting tasks.