Owner and Founder of ARUS Consulting
Home Energy Score Rater, BPI Building Analyst Professional
ARUS was founded by Parker Lahti in 2017. With over a decade of experience in building science and energy efficiency advising, 5200+ assessments under his belt, and 30 full home renovations completed under his supervision, Parker founded ARUS to create a new model for residential energy assessment firms. ARUS is committed to the communities we serve and resident education. He still gets his boots muddy in the field--primarily with pilot services and assessment development--and he supervises both the administrative and field-advising teams. The great success and growth of ARUS has come mostly from word of mouth and relationships created in past projects.
BPI Building Analyst Professional,
Home Energy Score Rater, Senior Residential Efficiency Advisor,
B.S. in Sustainable Energy Management
One of our senior advisors, Sean, has years of energy efficiency contracting experience, both as an employee and an owner. Sean has over 6 years of customer service experience, sales, and construction, and has designed, sold, and implemented 300+ energy efficiency and insulation jobs in the Northern Colorado region. He previously performed low-income weatherization for the most vulnerable members of our community. He applies his passion for indoor air quality and healthy homes to provide exceptional customer experiences, accurate testing for assessments, and post-assessment advising. He holds Home Energy Score certifications that support this role and has been conducting energy assessments and advising in Northern Colorado for over 6 years. He also has managed other energy efficiency programs, working as a contract manager, experience with the Boulder EnergySmart program and served as the lead auditor/implementer for the Boulder CARE program.
BPI Building Analyst Professional,
Home Energy Score Rater, Residential Efficiency Advisor, Certified Radon Tester, Certified Mold Inspector,
Certified Professional Inspector & Indoor Air Quality Professional
Robert is a proud veteran and owns and operates his company ABR Inspections, LLC doing residential and commercial inspections, along with radon, mold, and asbestos testing. Robert has been working in the Efficiency Works program since 2016 and conducts some of our residential assessments on top of running his own business and helps customers navigate home efficiency improvements. Many of his repeat clients are single family residence builders, commercial investors, real estate agents, and many more of northern Colorado's residents!
BPI Building Analyst Professional,
Home Energy Score Rater, Radon Mitigation Specialist, Radon Measurement Professional,
Program and Field Operations Manager
B.S. In Urban Planning
Chance began his journey with ARUS in November of 2022. He is originally from South Florida, moved to Colorado for this opportunity to work with ARUS. Holding a Bachelor's Degree in Urban Planning from Florida Atlantic University, he has also obtained BPI certifications and focuses on Efficiency Works Assessments. In his spare time Chance enjoys skiing and hiking at high altitudes with his wife Chloe. His passion lies in aiding people in transforming their homes into the most efficient and environmentally friendly spaces possible.
BPI - Building Science Principles Certified
Office Administrator
I was born and raised in Washington before moving to Colorado to attend Colorado State University, where I spent six years earning my degree in Liberal Arts and Business. After that, I returned home to Washington and worked in administration and with kids, gaining valuable experience in fast-paced, people-focused environments. A few months ago, I made my way back to Colorado for a fresh change of pace—and I’m excited to be here.
When I’m not working, you’ll usually find me outside with my puppies (and occasionally my kitten), soaking up the fresh air and sunshine. I also love traveling with my family—exploring new countries, experiencing different cultures, and always chasing the next adventure.
BPI - Building Science Principles Certified
Office Programs Coordinator
A.A. In Business Administration
Kelsey was born and raised in Northern California and moved to Colorado in 2017. She has worked in customer service for 15 years and construction supply for 3 years. In my spare time, She loves to go hiking, fishing, camping, rock climbing and spend time with her daughter, two kitties, and boyfriend. She also enjoys watching movies, listening to music and playing video games. Her passion is to get her Master's Degree in Accounting and to expand her knowledge more in the accounting field to excel at ARUS in my specialty.
Office Programs Coordinator
BPI - Building Science Principles Certified
Originally from Kansas, I recently made my way back to beautiful Colorado — and it truly feels like coming home. I'm a proud mom, a live music lover, and someone who leads with heart in everything I do. I’m always up for an adventure, whether that means exploring a new city, discovering great music, or planning my next getaway. Travel has taught me to stay curious, flexible, and open — qualities I carry into both my personal and professional life. In my work, I’m all about showing up with consistency, kindness, and a can-do attitude. I care deeply about people and take pride in creating meaningful connections, both in the professional world and in everyday life.
BPI Building Analyst Professional,
Home Energy Score Rater, Residential Efficiency Advisor
EPA Certified, NATE Certified
TJ was born and raised in Fort Collins, Colorado. He is an avid outdoorsman and loves to camp with his wife, daughter (9) and son (6). TJ has experience working in the HVAC industry for 21 years at his grandfather's and father's companies. He started his journey in the inspection industry in 2022 and is excited to continue helping homeowners and helping them solve problems within their homes.
BPI Building Analyst Professional
Blue Sky Curriculum & Course Designer
Cameron commenced his employment with ARUS Consulting in May of 2023. Born and raised in Brighton, Colorado, he later migrated northward, earning his Bachelor's in History and Education from the University of Northern Colorado.
He currently resides in Greeley with his wife Baileigh, he also serves as the Associate Pastor of Church of All Nations. His role within the team involves the CARE program, funded through Energy Outreach of Colorado. He eagerly anticipates contributing to the enhancement of energy efficiency in NoCo, ensuring homes are comfortable regardless of the unpredictable Colorado weather.
BPI Building Analyst Professional,
Home Energy Score Rater, Junior Residential Efficiency Advisor
Jackson began his employment with ARUS in April, 2025. Originally from Northeast Florida, Jackson moved to Colorado to start a career as an energy efficiency consultant. He has previous experience in the construction industry as a plumber and has a passion for improving home comfort and safety across Northern Colorado. When he isn’t working Jackson enjoys working with volunteer trail maintenance crews and hiking in alpine environments.
Training Director
BPI Building Analyst Professional
Scott Suddreth has been teaching building science and home performance contracting for over 25 years. As the Director, he manages the training center focusing on the latest technologies and the industry's best practices.
BPI Building Analyst Professional,
Home Energy Score Rater, Junior Residential Efficiency Advisor
B.S. In Conservation Biology
Ben was born and raised just outside Denver, CO. He grew up with a passion for nature and was inspired by the beauty of the state of Colorado. He refined that passion into a Fish, Wildlife, and Conservation Biology degree from Colorado State University in Fort Collins but developed a new interest in clean energy and efficiency. He was able to explore this interest and his passion for nature by pursuing building science and helping homeowners transition to cleaner and more efficient homes. He is starting his family in Fort Collins and wants to continue making an impact in his community. He is excited to grow in this industry and make an impact on northern Colorado's carbon footprint.
BPI - Building Science Principles Certified
Office Assistant
I’m Sarah, a Colorado native born and raised in Estes Park. I bring over 20 years of customer service experience, nearly 2 years in the solar industry, and have a strong reputation as a dependable, jack-of-all-trades ready to learn something new every day.
Outside of work I'm a proud mother of three amazing kids. I love music, writing, painting, camping, soaking up the sun, or relaxing by a fire under the stars with plenty of fresh air.