
About Us
The gift of that fire was to put a fire under my ass to move away from chemical fertilizers. It fast-tracked us into a path of using microbes to drive soil health, to reduce fertilizers. It drove us on a path that is today Holganix.”
— Barrett Ersek
Founder & CEO, Holganix
Our Core Values promote growth, too.
We live and breathe our Core Values every day so we grow in all aspects of our work.

FLOW is in our DNA
Gratitude
We trust that everything life brings – both joyful and challenging – is a gift.
Flow
Flow is living with trust, hope, and joy. We focus on what we’re for, not for what we’re against, keeping obstacles (“the rocks in the flow”) out of the way.
Love
We love what we do, who we do it for, and who we do it with.
Creator Mindset
We are a community of creators, neither passengers, nor victims. We are learners, not knowers.
Win-win
We persist in uncovering that “extra something” that ensures a meaningful win for everyone.
We built our company for you, to make a positive impact on all.
Boost Soil Health
Improve microbial life, organic matter and soil structure.
Conserve More Water
Enhanced soil structure leads to better moisture retention and drought resilience.
Build Yield Stability
Improvements in yield while cutting back on fertilizer.
Reduce Fertilizer & Chemical Use
Up to 40% reduction in fertilizer as soil biology begins working.
Withstand Weather Shocks
Help crops survive temperature swings.
Help Farmers Earn Additional Revenue
Enroll in our Farm Possible Program to earn more for your hard work.
Give Back To Local Nonprofits
Each acre enrolled in Farm Possible generates an expected $10 to local community projects.
Leading the way.

Austin Hausmann
Chief Technology Officer
Austin Hausmann is a seasoned technology leader with a background in renewable energy and a passion for building systems that scale. At Holganix, he oversees data infrastructure and product innovation, aligning technology with the company’s regenerative mission. Known for his clarity in technical communication and ability to bridge engineering and business, Austin has led successful efforts in team building, product design, and go-to-market development. He's the type of CTO who can discuss machine learning architecture and tree planting strategies in the same breath.

Barrett Ersek
Founder & CEO
Barrett Ersek is a serial entrepreneur in the lawn and landscape industry and the founder of Holganix. With a deep commitment to soil health and a vision for regenerative agriculture, Barrett has been a driving force in creating biologically based solutions that are good for growers, the planet, and the bottom line. He’s an expert on innovation and leadership—his work has been featured in Harvard Business Review—and holds three patents. When not working, Barrett is known for spinning a great story, sharing his latest read, or quoting philosophers with surprising relevance.

Bryan Hansel
Chief Revenue Officer
Bryan Hansel is a growth-focused executive with over 30 years of experience bringing disruptive technologies to market across the product development, medical, electronic, and automotive sectors. Most recently, he led efforts in commercial electric vehicle adoption. At Holganix, Bryan heads up revenue strategy, channel development, and field operations—helping soil reps and growers alike drive success. He’s a strong believer in performance rooted in purpose and leads with contagious energy. Off the clock, Bryan's favorite fuel is probably a high-speed trail run or a post-field coffee.

David Stark, Ph.D.
President Holganix Agriculture
Dr. David Stark brings more than 25 years of experience from Monsanto, where he served in executive roles including VP of Global Trade Partnership, VP of Consumer Traits, and Co-President of NatureMark Potatoes. A molecular biologist by training, he holds nine patents and has authored 26 scientific papers. At Holganix, David brings scientific rigor and market insight to the company’s soil health initiatives. He’s known for combining academic excellence with a grounded, farmer-first approach—and for being just as comfortable talking genetic pathways as he is planting potatoes.

George Mazzella
Vice President of HGX Global Commercial
George Mazzella is a climate-focused entrepreneur with a global track record—generating more than $400 million in investment for scaling carbon projects across 10+ countries. At Holganix, he leads commercial strategy for HGX, turning agriculture into a climate solution while delivering measurable outcomes for growers and the planet. His work bridges markets and mission, with deep experience in carbon finance, project origination, and boots-on-the-ground execution. If you catch George outside of work hours, he's probably nose-deep in a geopolitical biography or perfecting a risotto.

Kaitlyn Ersek
Chief of Staff
As Chief of Staff, Kaitlyn leads strategic initiatives across the executive team—connecting vision to execution and ensuring momentum behind high-impact projects. With a background in communications and marketing and an MBA to back it up, Kaitlyn brings clarity, structure, and thoughtful problem-solving to every corner of the organization. Outside the office, Kaitlyn recharges in nature—hiking, camping, gardening—and always with a mug of tea and a good book nearby.

Radhika Moolgavkar
VP of HGX Product
Radhika Moolgavkar is a soil carbon expert with over six years of experience in sustainability, including four focused specifically on soil carbon credits. At Holganix, she leads product strategy for HGX with a mission to help farmers improve soil health through solutions that are scalable, profitable, and environmentally sound. Radhika brings a systems-thinking approach to climate and agriculture and has a soft spot for farmers who "get a kick out of regenerative data." Off the field, she’s known for her love of long hikes and strong espresso.

Rob McCoy
Chief Operating Officer
Rob McCoy brings more than 20 years of experience in the green industry, with a track record of building and selling two successful companies. At Holganix, he serves Chief Operating Officer and Executive Vice President of Commercialization for Holganix Ag, where he leads go-to-market execution, operational strategy, and team performance. A competitor at heart, Rob thrives on turning big ideas into operational wins—and if there's tailgating involved, he’ll rearrange his calendar.

Tim Weaver
Chief Strategy Officer
Tim Weaver has helped drive more than $900 million in incentives for sustainable markets and overseen over $2 billion in economic development initiatives across North America and Europe. At Holganix, he orchestrates corporate strategy to scale regenerative agriculture in ways that align impact with innovation. A strategic builder at heart, Tim thrives at the intersection of business development, public-private partnership, and long-term value creation. He also holds the unofficial office title of “most likely to open a meeting with a one-liner.”
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Major Milestones

What our team is talking about...
- I just feel really grateful to wake up every day and be able to participate in an opportunity and a project that I believe is gonna change the world.”

— Alex Faust
Business Development Manager
- Realize that basically 2% of the population feed 100% of the world.”

— Brian Strider
Soil Health Specialist Manager
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If we can help alleviate some of those longer nights or earlier mornings, and give that back to the farmer and their family, I think that will be the biggest win.”

— Adam Rolf
Soil Health Specialist
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We want growers to thrive as much as possible and put more dollars in their pocket to help with the next season.”

— Morgan Shakelford
Soil Health Specialist
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I love the people we get to work with, the growers we meet, Acre Analytics, ChrysaLabs, all the different companies that we work with–all having one goal, and that’s soil health, and having as healthy a soil as possible for future generations.”

— Hayden Walker
Digital Agronomist
Be a part of the team.
We’re always on the lookout for the next incredible teammember to make us stronger, better, smarter. If you’re passionate about making a difference in farming, the land, food, and communites as a whole, make Holganix your next career move!