Come meet our energy experts!  Reach out to us with your questions and opportunities.

Chet Knaup

Chet Knaup



Chet’s interest in energy efficiency began in 2000, while working for an HVAC manufacturer. Since then, Chet transitioned into consulting engineering where his passion for energy efficiency blossomed and grew, as he practiced in one of the greenest cities in the US: Portland, OR. Over the past 20 years, Chet has had the unique opportunity to work on energy efficient projects in numerous states, multiple countries across five continents.  His passion for developing unique methods of energy reduction has never wavered.

Chet has worked with green building certification programs for the past 14 years and has been fortunate to have worked on LEED and Passive House (PHIUS) Certified projects, as a Mechanical Engineer, Energy Engineer, Sustainability Consultant and Project Manager.

Image of Sandy Barrier

Sandy Barrier


Business Development, Account Manager with extensive experience in Energy Efficiency projects in the commercial, health care, industrial, schools, universities, municipalities, federal and local governments buildings, along with data centers.  Sandy previously worked for ICF, under the Pepco Empower Maryland Incentive programs, 2017-2021, working to ensure collaboration for key accounts to meet energy efficiency goals. Her Strong business development skills, professional reputation, customer service has built strong relationships, in her over 30 years working in Montgomery County.  Associate degree focused in Business, Management, Marketing, and Related Support Services from Montgomery College.

Shailesh Negi

Shailesh Negi



He is a licensed Certified Energy Manager and Business Energy Professional with over 12 years of energy engineering, energy management experience.  His interest in energy efficiency and management sparked in 2008 when he was granted an opportunity to work as a Research Associate with the Industrial Assessment Center at Oklahoma State University. He turned his interest into a full-time passion and has ever since gained valuable experience developing turnkey energy projects for Commercial and Industrial sectors. His expertise further expands to providing technical leadership and cost-effective framework for various state driven utility demand response programs.

Shailesh also serves as a mentor and believes in fostering an environment where brainstorming leads to practical ideas and effective solutions for his clients. During his free time, Shailesh enjoys traveling, watching sports, cooking, and spending time with his family.

Tom Polansky

Tom Polansky


Mechanical engineer executive with 30 years of experience in the areas of energy conservation projects, design of energy efficient mechanical systems, implementation of emerging renewable energy distributed generation technologies, and all types of energy efficiency.

Earlier in his career, Tom was instrumental in selling and overseeing projects with the military and NASA including specialized HVAC systems to cool docked submarines, ruggedized mobile electronics shelters, anti-ballistic missile defense systems, three of the space shuttles, Delta rockets, and highly specialized transport systems for satellites. Later in his career, he was responsible for many energy projects including extensive energy projects at five large Army garrisons in the MD/VA/DC area.

With his passion in energy efficiency, he analyzes buildings to determine the most cost-effective energy conservation measures using both conventional and out of the box approaches.

Zachary Yamin

Zachary Yamin

LEED GA, EIT, CEM (In Progress)


Zachary is a mid-level energy engineer at Spectrum Energy. He received his bachelor’s degree in Mechanical Engineering from the University of Maryland with a focus in energy efficiency. The entirety of his professional career has been focused on assisting clients with making energy-conscious design decisions. With his expertise in energy modelling and incentive programs, customers are provided with cost-effective solutions to reduce their carbon footprint, improve indoor environmental quality, and increase their bottom line. 

Tony DiGennaro

Tony DiGennaro


With four years of industry experience in mechanical design, Tony brings to the team a breadth of knowledge in both building design and control systems. He earned his bachelor’s degree in Mechanical Engineering at the University of Maryland Baltimore County. During his time as a controls engineer, he took an interest in energy conservation. Now as an Energy Engineer at Spectrum Energy, he produces energy models and project analyses, providing energy-efficient and cost-effective solutions to our clients.

Trevor Pontacq

Trevor Pontacq


Trevor is an Energy Engineer who received his bachelor’s degree in Mechanical Engineering from the University of California, Davis. After dedicating his time in college to researching alternative forms of renewable energy Trevor was motivated to pursue a career as an Energy Engineer at Spectrum Energy. Utilizing his experience with building energy modeling, Trevor works with clients to determine energy conservation measures that can help projects reach their full energy efficiency potential. He is determined to uncover all available financial benefits for customers searching to become energy efficient and save on costs.

Zachary Barefoot

Zachary Barefoot


Zach is an energy engineer at Spectrum Energy. He received his bachelor’s degree in Mechanical Engineering from Virginia Tech, focusing on sustainable energy and energy efficiency. Zach assists customers in cost-savings solutions for energy conservation measures in new and existing buildings utilizing energy modeling and life cycle cost analysis.

Hailey's headshot

Hailey Brennan


Hailey is an Energy Engineer who received her bachelor’s degree in Mechanical Engineering from the University of Maryland. Her enthusiasm for energy engineering arose from her hands-on experiences in HVAC, combining it with optimization and consulting skills learned throughout college and various internships. She has participated in SkillsUSA, MCAA, and CMAA, among other activities. She has proven leadership skills in teambuilding and public speaking.
Hailey is motivated in giving back to the community, serving as a mentor to students interested in a career in the mechanical field, and acting as the Historian Committee Chair for ASHRAE Baltimore.

Ben Yee

Benjamin Yee


Graduated from the University of Maryland, Baltimore County with a bachelor’s degree in Mechanical Engineering. Ben has experience in interpersonal skills working with construction crews, military personnel, and customers from retail. In addition, he has experience working in the automotive division as an engineer for the military with data analysis for bridge crossing simulators to improve structural integrity and other related military vehicles performances. Ben has a passion for delivering excellent customer experience and has HVAC building design project related experience in performing energy analysis and energy efficiency.

Let's Explore Your Opportunities