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Colorado's premiere geologic consulting firm

With our thoughtful approach to operations geology, and our cutting-edge geosteering services, we remain focused on one simple ideal: how can we help our clients streamline their operations and improve their bottom line? From our central location we are able to serve clients in Colorado, New Mexico, North Dakota, Oklahoma, Kansas, Texas, Utah, and Wyoming; and our skilled consultants have experience in all of the major oil and gas basins in this region (Permian, DJ, Eagle Ford, Powder River, Williston, Arkoma, Anadarko, Ft Worth, San Juan, Piceance, Paradox, Uinta, and Green River).

:: Experienced

:: Innovative

:: Affordable

We're growing, and so is our list of services

Whether you are a large E&P in need of more reliable geosteering, or a smaller company that needs a complete A&D, development, and operations team, our highly skilled geologists can meet your needs. With all of our services we provide accurate, timely interpretations through our secure online reporting system so our clients can access their data anywhere, anytime using a computer or smartphone. We use Kingdom, StarSteer, and ZoneVu for mapping and geosteering.

:: Operations Geology

From planning to execution we've got you covered

:: Geosteering

Accurate interpretations based on all of the available data

:: Wellsite Geology

Tracking crucial information from cuttings and rig sensors

:: Data Management

Setup and organize StarSteer and Kingdom projects

:: Post-Drill Analysis

Gun barrels, ROP heat maps, and MSE optimization

:: Basin Assessments

Competitor spacing analysis and multivariate analytics

:: Mapping

Petrophysics, net pay maps, and structure grids

:: Development

Well placement and well inventory analysis

:: Acquisitions and Divestitures

A&D presentations with high graded acreage maps by zone

:: Permitting

Prepare permits based on geology and regulatory requirements

:: Planning

Understand the geology before you drill

:: Sample Testing

Elemental XRF analysis of rock samples


"Earth Science Agency is bar none the best wellsite geology and geosteering service provider I have found. All wells 100% in zone. Absolutely the best!!."

Dan Berberick
VP Exploration - Cub Creek Energy

"Earth Science Agency's mudlogging services alone are far above par, but the online reporting system and on-site geosteering are the real game changers. The system ESA has built allows us to have constant up to date information at our fingertips. I appreciate all of the focus and dedication they have given to perfecting their system and look forward to continuing our relationship in the future."

Blaine Martin
Geologist - Bill Barrett Corporation

About Us

In 2003 on the shores of Lake Tahoe, Earth Science Agency began as a scientific and technical consulting company. For the past eighteen years we have served businesses, government agencies, and universities. Today, ESA is centrally located near Denver, Colorado to best serve our current client base.

ESA has a reputation for developing and utilizing breakthroughs in earth science and related technologies. Our mission is to help our clients streamline their operation and improve their bottom line.


Ross Apodaca, BS
Steven Herbst, MS
Garrett Hickman, MS
Griffin Mann, MS
Kyle Newman, BS
Dominic Pitre, BS
Scott Snoy, BS
Mitch Weller, MS

Geodata Scientists

Bharathi Vallalar, PhD

Geoscience Management

Vandy Blue Spikes, PhD - President
Jason Anderson - Chief Exploration and Development Geologist
Dan Moore - Geologic Adviser & Chief Data Scientist
Scott Hampton - Geoscience Services Manager
Hannah Hubert - Geoscience Operations Manager

Office Management

Liv Spikes - Business Manager
Tag Spikes - IT Manager

Current Openings

All applicants must be US citizens and live in Colorado, pass background and drug tests, and comply with all health and safety rules. All positions are full time with benefits. Please send resumes to

No current openings


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