Quarter Circle 3 Ventures

Quarter Circle 3 Ventures

A family venture office.

Celebrating 100+ years of family collaboration

Origin

100 years of family enterprise, carried forward.

In June of 1925, at the age of 23, Luis Eisaguirre left his home in the Basque Country of Spain bound for America. He quickly found his opportunity in the mountains of western Colorado. As was tradition, he labored hard as a sheep herder, soon earning his own small herd. He partnered with his brother Rufo and together they built a modest but fruitful family business, the original Eisaguirre family venture.

Luis' son Joe was born into this family business, and it was formally passed to him in June 1962, documented through a formal "Quarter Circle 3" livestock brand conveyance. Joe further expanded the operation to include cattle ranching with properties and leased range operations throughout southwestern Colorado.

Lew Eisaguirre, Joe's son, was born into this traditional and entrepreneurial environment. With his father's strong encouragement and sponsorship, he obtained an education in economics with an MBA and the conviction that the fruitful ranching business model of the time had run its course.

Lew seized on the entrepreneurial spirit and launched a number of his own business ventures over the subsequent 30+ years, all focused on potentially disruptive technologies and innovative business models. He also professionally managed a successful venture oriented family office.

This inspired the formation of Quarter Circle 3 Ventures in 2025, combining efforts with his two sons Joseph and Jake, who had already found professional success striking out on their own.

Thesis

QC3 is founded on the opportunity of this lifetime: Physical AI.

Today QC3 Ventures is founded on the premise that the diversified experience and skills of an integrated family operation, coupled with the convictions of a highly functional team, create compounding advantage.

Lew's prior ventures have focused on the emerging technologies of their time while navigating the volatility of the major tech cycles of the past 40 years, from the rise of telecom and media, to personal computing and the internet, through the mobile and social media revolution, to today's era of cloud, artificial intelligence, and now Physical AI. Coupled with the period's major financial cycles, the dot com bubble, the 2008 global financial crisis, crypto booms, and periods of rapid expansion and volatility, Lew's journey reflects a deep understanding of both technological transformation and the economic forces shaping our world.

Joseph and Jake's successful careers are founded on deep expertise in data engineering, statistical modeling, and research disciplines grounded in real world earth sciences. Together, this generational experience uniquely positions this venture office to develop applied and integrated emerging technologies, and specifically the opportunity of this lifetime: Physical AI.

What we do

At QC3 Ventures we look to expand our family and partner with like minded enterprises and prospective team members, leveraging our experience and commitment in building companies and recruiting effective teams and strategic partners.

We are positioned to lead initiatives and support others in the development of their big niche ideas within our Physical AI thesis. Although modest by many capital and family office standards, we are comfortable incubating big niche concepts, seeding ideas, building teams, and rolling up complementary technologies coupled with the experience of growing and combining enterprises to successful exits and IPO.

Team

Three founders. Complementary conviction.

Lew Eisaguirre

Lew Eisaguirre

Founder

MBA, University of Fairbanks | BA Economics, Colorado College | Co-CEO, TerraFirma Robotics

Lew's prior ventures have focused on the emerging technologies of their time while navigating the volatility of the major tech cycles of the past 4 decades, from the rise of telecom and media, to personal computing and the internet, through the mobile and social media revolution, to today's era of cloud, artificial intelligence, and now Physical AI. Coupled with the period's major financial cycles, the dot com bubble, the 2008 global financial crisis, crypto booms, and periods of rapid expansion and volatility, Lew's journey reflects deep learnings of both tech transformation and economic forces shaping our world including the current prospect for circularity.

Lew started with early experience in environmental economics through degrees from Colorado College, and applied MBA skills with Price Waterhouse Consulting. Since those early structured days, he has founded and scaled over 20 startups including factories, developed satellite-based communication business, founded SaaS companies, some direct and others while running a family venture office. He has taken a startup public as founder and CFO (Nasdaq: INDE), started a venture fund and managed nearly all types of public and private financings and exit transactions.

QC3 Ventures is the culmination of applying all this experience with family both born and adopted to incubate and pursue the passion of a lifetime, physical AI and prospect for circularity it will inspire.

Jake Eisaguirre

Jake Eisaguirre

Co-Founder & Technical Leadership

M.S. Environmental Data Science, UC Santa Barbara | B.S. Environmental Studies | Co-CEO, TerraFirma Robotics

Jake's path to Physical AI began not in a lab or a startup, but in the field. Nearly a decade of hands-on environmental research, from conducting kelp forest surveys with PISCO across the Northern Channel Islands to managing ecological datasets for the Resilience Institute (RIBBiTR) and analyzing pelagic fisheries with the California Department of Fish and Wildlife, gave him a deep understanding of what environmental monitoring actually requires at the point of collection. That fieldwork revealed a fundamental gap: the boundary layer data that matters most for understanding ecosystems is the hardest to collect at scale.

Bridging that gap required building systems, not just collecting samples. Jake earned an M.S. in Data Science from UC Santa Barbara's Bren School and a B.S. in Environmental Studies, then moved into enterprise data engineering. As a Senior Business Intelligence Engineer at Alaska Airlines, he designs production-grade data pipelines using PySpark, Delta Tables, and Databricks Lakehouse, leading post-merger data integration following the Hawaiian Airlines acquisition. He specializes in medallion architecture (bronze to silver to gold), schema governance, and AI agent development for data automation, the same architectural patterns that now power TerraFirma's cloud data platform.

At QC3 Ventures, Jake serves as the technical bridge between environmental science and scalable AI systems. He leads TerraFirma's full technology stack, from edge AI on NVIDIA Jetson and autonomous flight systems to the Databricks cloud infrastructure that processes millions of observations into trustworthy environmental intelligence. His conviction is that the tools to understand our planet at the resolution it demands are finally within reach, and that building them is both the opportunity and the responsibility of this generation.

JE

Joseph Eisaguirre

Co-Founder & Scientific Research

Ph.D. Biological Sciences, M.S. Statistics, University of Alaska Fairbanks | B.A. Biology, Colorado College

Joe's path to Physical AI started in the field, working directly with scientists and wildlife managers who needed better tools to infer the hard-to-measure processes that drive ecosystem change. Nearly a decade of work in wildlife ecology and statistics, from tracking golden eagles and Arctic caribou to studying sea otters and Pacific walrus, gave him a ground-level view of how difficult it is to turn raw environmental data into decisions.

That experience shaped his conviction that the next leap in environmental monitoring and management will come from tightly integrated hardware, software, and models that respect both the physics and the biology on the ground. Joe's technical foundation is built from a Ph.D. in Biological Sciences and an M.S. in Statistics from the University of Alaska Fairbanks with a B.A. in Biology from Colorado College.

His research has spanned movement and migration ecology, risk mapping, and population dynamics, with peer-reviewed work on a range of quantitative methods, including mechanistic movement models, ecological diffusion, and habitat selection applied to a range of species. In parallel, he has built open-source tools and visualization platforms that help translate telemetry and survey data into operational insight for practitioners who have to make calls under uncertainty, not in theory.

He is active in the broader scientific community, mentoring students and postdocs, holding leadership roles in professional societies, and receiving recognition from federal agencies for impact and early-career leadership. That background reflects a consistent focus on practical, mission-driven problems rather than purely academic ones. At QC3, his mix of field perspective, quantitative rigor, and tool-building informs how he evaluates opportunities and helps shape Physical AI solutions designed for complex environments.

Publications

Peer reviewed literature from the QC3 team.

Selected publications from the QC3 team.

Portfolio

Current projects within the QC3 orbit.

TerraFirma Robotics

Autonomous robotics for earth science and environmental intelligence.

Flagship

TerraFirma Robotics is developing advanced autonomous systems for environmental monitoring and earth science applications. Our platform combines cutting-edge robotics with sophisticated data analytics to provide unprecedented insights into ecological systems and environmental conditions.

Our integrated platform leverages advanced robotics, machine learning, and environmental data science to deliver actionable intelligence for research institutions, government agencies, and environmental organizations.

Currently in stealth mode. TerraFirma Robotics is preparing for market entry with proprietary technology developed through extensive R&D and strategic partnerships in the environmental science sector.

Visit TerraFirma

Zaca Preserve

Conservation-focused land development and stewardship project.

In Development

Zaca Preserve represents a thoughtful approach to land conservation and sustainable development in Santa Barbara County. This strategic real estate project prioritizes environmental stewardship while creating long-term value through responsible land management and conservation practices.

The project is advancing through the final map recordation process, with careful attention to regulatory requirements and environmental impact considerations. Our approach prioritizes sustainable land use and conservation outcomes.

Zaca Preserve demonstrates our commitment to projects that balance economic value with environmental responsibility, creating lasting positive impact in the communities where we invest.

Contact

Share our passion? Reach out.

Interested in our portfolio companies or exploring partnership opportunities? We'd love to hear from you.

Get in touch

Email: [email protected]

Focus: Physical AI, Earth Science, Robotics

Approach: Family venture office with technical expertise

What we're looking for

  • Physical AI applications
  • Earth observation & robotics
  • Environmental technology
  • Partnership opportunities

Let's discuss opportunities in Physical AI and earth science technology.

Contact Us