What Lonquist & Co., LLC does

Lonquist & Co., LLC is a privately held subsurface engineering and construction firm founded in 2005 and headquartered in Austin, Texas, with approximately 100 employees and consultants distributed across seven North American offices in Austin, Houston, Denver, Baton Rouge, College Station, Calgary, and Regina. The firm delivers integrated petroleum engineering, geology, regulatory, and project execution services to enterprise clients in the oil and gas, industrial CO2, mining, energy storage, and battery minerals sectors. Its core offerings span drilling and completion (Classes I, II, III, V, and VI wells), workovers, well evaluation and testing, 2D/3D/VSP seismic surveys, solution mining and salt cavern development, underground injection and waste disposal, reservoir storage (natural gas, CO2, hydrogen), carbon sequestration (including Class VI permitting), battery minerals (lithium, barium), geothermal, wind/solar mineral access, and expert testimony.

The firm operates on a project-based professional services model, with all engagements quoted individually given the specialized, bespoke nature of subsurface engineering work. Revenue streams are organized around engineering and consulting services, project execution, regulatory and compliance support, and industrial minerals mining support. Technology is anchored in established reservoir simulation platforms (GEM, tNavigator, ARIES, PHDwin) and proprietary subsurface workflows accumulated across thousands of North American projects; the firm holds ISO 9001:2015 certification and operates with credentialed staff including licensed Professional Engineers, Professional Geologists, and dual-credentialed engineers. The go-to-market motion is direct enterprise field sales targeting energy majors, industrial operators, mining companies, and government entities requiring complex subsurface, regulatory, or storage infrastructure solutions.

Name

Lonquist & Co., LLC

Legal name

Lonquist & Co. LLC

Website

https://lonquist.com

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

101–250 employees

Short description

Lonquist & Co., LLC is a privately held subsurface engineering and construction firm founded in 2005, serving oil and gas, industrial CO2, mining, and energy storage clients across North America with integrated drilling, solution mining, carbon sequestration, and regulatory services from seven offices.

Ownership category

akta.pro rank

Product category

Petroleum Engineering Services

NAICS

Geophysical Surveying and Mapping Services (54136), Geophysical Surveying and Mapping Services (541360), Support Activities for Metal Mining (213114)

SIC

Oil & Gas Field Exploration Services (1382)

akta.pro primary industry

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB)

akta.pro secondary industries

Seismic & Geoscience Services (Acquisition, Processing, Interpretation) (EUALABAK), Mineral Exploration & Geoscience Services (Geology, Geophysics, Geochemistry, Resource Modeling) (IMAKAKAA)

Keywords

• Petroleum engineering services
• Subsurface engineering consulting
• Solution mining services
• Carbon sequestration engineering
• Underground storage development

Headquarters

HQ city

Austin

HQ country

United States

HQ region

North America

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Revenue model

1. Engineering and Consulting Services: Professional engineering and consulting services for subsurface projects including reservoir engineering, geologic evaluations, economic evaluations, regulatory support, and expert testimony
2. Project Execution Services: Hands-on project execution including drilling, completions, workovers, well testing, and construction management for wells and caverns
3. Regulatory and Compliance Services: Permit application preparation, regulatory filing support, regulatory testimony, and compliance monitoring for UIC programs
4. Industrial Minerals Mining Support: Frac sand resource exploration, lab testing, field development, and mining support services

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Lonquist & Co., LLC is a subsurface engineering and construction firm serving the energy sector. It provides integrated petroleum engineering, drilling and completion, well evaluation, seismic surveying, solution mining, salt cavern development, underground injection, carbon sequestration, regulatory compliance, and reservoir storage services to oil and gas operators, mining companies, industrial emitters, and government entities across North America.

Product overview

Lonquist & Co., LLC is a globally recognized subsurface engineering and construction firm offering an integrated portfolio of energy sector services. The company operates as a unified platform of specialized engineering services rather than a single product, organized around core service lines: Solution Mining and Salt Cavern Development (including storage for hydrocarbons, CAES, ammonia, and waste disposal), Underground Injection and Waste Disposal (covering Class I, II, III, V, and VI wells), New Energy Solutions (encompassing CO2 sequestration, geothermal, battery minerals/lithium, and wind/solar), Petroleum Engineering Services (reservoir engineering, economic evaluations, resource studies, and expert testimony), and Project Execution (drilling and completion, workovers, well evaluation, seismic surveys, and HSE safety services). These services are delivered through integrated subsurface teams that combine regulatory, engineering, geological, and operational expertise to support clients throughout the full asset lifecycle from greenfield evaluation through long-term operations.

Differentiator

Problem solved

Functional benefit

Products and services

• Salt Caverns Development Development of salt cavern storage facilities through solution mining for hydrocarbon storage, compressed air energy storage, ammonia storage, and waste disposal applications, including sonar survey evaluation, 3D cavern mapping, and well design services. Targeted at energy storage operators and industrial users.
• Waste Disposal Services Underground injection and disposal well services covering Class I industrial waste disposal (hazardous and nonhazardous), Class II oil and gas disposal (saltwater disposal, acid gas injection, slurry injection), and Class V test and monitoring wells for industrial and oil and gas operators.
• Sequestration Services Carbon sequestration services including Class II and Class VI permit creation, regulatory support, geologic modeling, reservoir dynamic modeling, area of review evaluation, pre-operational testing plans, post-injection site care and closure, peer reviews, and due diligence for industrial CO2 emitters and energy companies.
• New Energy Solutions Integrated services for new energy and transitional initiatives including sequestration projects, lithium battery element developments, solar/wind farm resource access evaluation, compressed air energy storage, geothermal projects, and M&A support and due diligence.
• Reservoir Storage Services Underground storage services for natural gas, CO2 sequestration, and hydrogen storage, including greenfield site selection, geology and reservoir characterization, well design, volumetric calculations, and reservoir modeling and simulation for energy storage operators.
• Solution Mining Services Integrated solution mining expertise across the full asset life cycle supporting mineral production, hydrocarbon storage, and new energy storage projects with capabilities in vertical, horizontal, and gallery-based designs for domal, bedded, and hybrid salt formations.
• Project Execution Services Integrated subsurface services including drilling and completion, workovers, well evaluation and testing, seismic surveys, well-site safety, and industrial minerals mining support across the entire asset lifecycle for oil and gas operators and industrial clients.
• Safety Services (HSE) Health, safety, and environmental services providing site safety supervision, HSE system services including subcontractor safety audits, comprehensive safety plans and systems, and targeted HSE training programs for oil and gas operations.
• Petroleum Engineers Services Integrated technical and strategic expertise including reservoir engineering analysis, resource studies, mineral and owner royalty support, economic evaluations, regulatory expert testimony, and depleted reservoir storage services.
• Underground Injection Services Specialized underground injection and waste disposal services, salt cavern development, and reservoir storage services supported by full project execution capabilities from drilling and completions to workovers, well evaluation and testing, and seismic surveys.
• Regulatory Services Comprehensive regulatory support including integrated subsurface solutions for waste disposal, solution mining, and underground storage, with site characterization and expert testimony services for complex regulatory environments.
• Industrial Minerals Mining Support Services for frac sand resource exploration and coring including geologic assessment, API/ISO lab testing, field development support, sieve analysis, crush testing, and computerized particle analysis for mining operators.
• Battery Minerals Services Battery minerals services for lithium and barium including greenfield site selection, well design, reservoir simulation, inventory verification, permit preparation, operational audits, geology and reservoir characterization, field development, GIS mapping, well testing, and full EPC execution support.
• Geothermal Services Geothermal project evaluation and planning services integrated within the new energy solutions portfolio for energy developers and utilities.
• Reservoir Engineering Reservoir engineering support including volumetric calculations, SEC and fair market valuations, mergers/acquisitions/divestiture support, due diligence, bid formulation, deal structuring, fairness opinions, and economic forecasts using ARIES and PHDwin software.
• Resource Studies Resource studies including pipeline capacity analysis, production forecasts, and reserve-based supply studies for natural gas, crude oil, condensate, NGLs, salt, and frac sand for energy companies and investors.
• Economic Evaluations Economic evaluation services including SEC/SPE/WPC reserve determinations, Canadian NI 51-101, international reserve determinations, fair market value opinions, estate evaluations, and corporate recovery services.
• Expert Testimony Expert testimony services for depositions and hearings including technical hearings, litigation support, assessment of economic implications, and resolution of technical litigious cases related to oil and gas production, water resource management, environmental impacts, and reservoir-related litigation.

Segments5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators3 records

Recent moves1 record

Expansion highlights5 records

Direct peers

• Sproule: Calgary-based petroleum engineering and geoscience consulting firm offering reservoir evaluation, resource studies, and advisory services. Directly comparable as a North American subsurface engineering consultancy serving E&P operators and energy storage clients.
• Netherland, Sewell & Associates: Dallas-based petroleum engineering and geoscience firm providing reserves audits, reservoir engineering, and economic evaluations. Comparable professional services peer with overlapping SEC reserves, expert testimony, and reservoir engineering offerings.
• Ryder Scott Company: Houston-based petroleum engineering consultancy specializing in reserves evaluations, reservoir studies, and SEC reporting. Closely comparable in service mix, scale, and customer base to Lonquist's petroleum engineering practice.
• DeGolyer and MacNaughton: Dallas-based petroleum consulting firm offering reservoir engineering, geological evaluations, and expert testimony. Comparable as a long-established subsurface engineering consultancy serving major oil & gas operators globally.
• W.D. Von Gonten & Co. Houston-based petroleum engineering and geoscience consultancy. Directly comparable boutique competitor with overlapping reservoir, geology, and reserves evaluation services for E&P operators.
• Cawley, Gillespie & Associates: Texas-based petroleum engineering firm focused on reservoir engineering and reserves determination. Comparable in scale, services, and North American operator client base.

Broad incumbents

• Schlumberger (SLB): Global oilfield services and digital solutions major. Overlaps with Lonquist across drilling, completions, reservoir characterization, and carbon storage services, but at vastly greater scale and as part of an integrated portfolio.
• Halliburton: Global oilfield services major with offerings spanning drilling, completions, geoscience, and emerging CCUS services. Competes with Lonquist for major operator contracts and on carbon storage project execution.
• Baker Hughes: Global energy technology and services company with oilfield services, industrial energy, and CCUS portfolios. Comparable through its carbon capture and storage consulting and execution capabilities.

Emerging players

• Battelle Memorial Institute: Non-profit applied science R&D organization with significant CCUS, underground storage, and energy transition programs. Comparable as an emerging player in the same CCUS technical and regulatory advisory space.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Lonquist & Co., LLC