
Mollie Olson
Founder and CEO
Mollie launched ECOcentrix (City of St. Louis, States of Missouri and Kansas WBE) in 2011 after recognizing the potential of helping people understand the importance of air quality for their health and wellbeing. While traveling with the global MBA program at Webster University in St. Louis, she saw first-hand the varying degrees of interior and exterior air quality across the world.
Born and raised in St. Louis, Mollie is a third-generation entrepreneur, following in the footsteps of her late father Mike Harris, founder of E.M. Harris Construction Company and Capital Consultants and her late grandfather E. M. Harris, Jr. founder of E. M. Harris Building Company. She is still inspired by her family’s legacy to serve the community through building healthy environments.
Mollie is a recognized expert in the energy field and is certified to all industry standards. She serves as the energy expert for the St. Louis County Building Code Review Committee.
In 2020, Mollie, with her husband Aaron, expanded the company’s energy solutions to include solar installation for residential and commercial business. Together they are expanding their portfolio of solutions of sustainable, clean, efficient energy for a better future for all.
Years of Experience:
13
Notable Achievement:
Currently sitting as the Energy Expert on the St. Louis County Building Code Review Committee
Education:
Bachelor’s of Science in Business Administration from University of Missouri, Columbia Master of Business Administration from Webster University
Certifications / Registrations/Training
- Building Performance Institute (BPI) Building Analyst
- Building Performance Institute (BPI) Envelope Professional
- Building Performance Institute (BPI) Multi-Family Building Analyst
- RESNET Home Energy Rater (HERS)
- NAHB Certified Green Professional (CGP)
- National Green Building Standard (NGBS) Green Verifier
- Missouri Department of Natural Resources Home Energy Auditor
- Level 1 Certified Infrared Building Investigator
- Association of Energy Engineers (AEE) Certified Energy Auditor
Summary of Experience
Mollie brings nearly a decade of sustainable building experience in new construction, renovation/rehab, green retrofit and historic preservation, with various types of buildings, including single and multi-family housing, mixed-use and commercial.
Her experience across various building and project types has helped her develop a comprehensive approach for cost effective sustainable design and construction.
Mollie received her Master of Business Administration from Webster University and is a licensed HERS Rater, BPI-Certified Building Analyst, Envelope Professional and Multi-Family Building Analyst, Certified Energy Auditor, National Green Building Standard Verifier and a Level 1 Building Thermographer.

Testimonials
Anytime I had questions the team would always be there to answer those questions promptly. They also made sure I was always informed of what was going on and the next steps in the process as well. Keeping an open line of communication was very important to me as I was very new to this process and it made me very appreciate of that fact.
The solar panels have worked wonders as well since they have been installed. We’ve seen a major decrease in the electric bill just as they said it would and it feels like a burden with the electric bill has been lifted. Thank you guys for what you do! I’d recommend everyone to ECOcentrix!
From the start, Molly, Aaron, and their team, along with our sales rep Johnathon, made sure we fully understood the process. They answered all our questions and eased our concerns every step of the way. The solar panels they installed not only look sleek but have drastically improved our home’s efficiency—and we’re already seeing significant savings on our monthly power bills!
If you’re hesitant like I was, I highly recommend reaching out to ECOcentrix Energy Solutions. Their friendly, knowledgeable team will provide the education and guidance you need to make an informed decision. Give them a call today and start your journey toward energy savings and sustainability!
Johnathon delivered exceptional service, taking the time to thoroughly explain everything, from the initial energy audit to the energy efficiency solutions available to us. He made sure we knew exactly what to expect and helped guide us every step of the way.
The energy audit itself was very detailed, revealing areas for improvement that we hadn’t even considered. Thanks to ECOcentrix’s recommendations, we’ve not only made our home more efficient, but we’ve also seen a noticeable reduction in our monthly power bills. The savings have been incredible!
If you’re looking for a company that truly cares about their customers and provides expert solutions, I highly recommend ECOcentrix Energy Solutions. Molly, Aaron, and their team are fantastic, and they’ll help you make your home more energy-efficient while cutting down on costs. Give them a call—you won’t regret it!
The energy audit was extremely thorough, revealing key areas where we could make improvements. Thanks to ECOcentrix’s recommendations, we’ve not only improved the efficiency of our home, but we’ve also noticed a significant reduction in our monthly power bills. The savings have been impressive!
Overall, ECOcentrix Energy Solutions delivered top-notch service, and we feel confident that we made the right choice for our home and our energy needs. Highly recommend to anyone looking to improve energy efficiency and cut down on costs!
Reviews shown may include customers from Missouri and Illinois. Customer experiences may vary.
Professional Affiliations
BBB, Missouri Workforce Housing Association (MOWHA), MOSEIA, ILSEIA
Connect With Me On LinkedIn: https://www.linkedin.com/in/mollieolson/