McAlister GeoScience, Inc.

What McAlister GeoScience, Inc. does

McAlister GeoScience, Inc. is a privately held environmental consulting firm founded in 2012 by David McAlister and headquartered in Long Beach, California. The firm provides Phase I and Phase II Environmental Site Assessments (ESAs), site characterization, remediation planning and oversight, vapor intrusion assessments, methane surveys, asbestos and lead-based paint surveys, property condition assessments, and related regulatory closure services for contaminated and suspect properties. Its technical methodology follows ASTM E1527-21 and AAI standards for Phase I work and is delivered by a multi-disciplinary team of geologists, engineers, and environmental toxicologists.

The company's underlying technology is built around professional services workflows rather than a software platform: deliverables are produced by licensed professionals using standardized field investigation techniques, augmented by an in-house curated regulatory database (the OKI database, inherited from Orswell & Kasman in January 2025) that contains over 30 years of Fire Insurance Maps and Aerial Photographs supporting Records Search with Risk Assessment and Phase I ESAs. The firm operates from three offices — Long Beach (HQ), Seattle (acquired 2021 via Eco Compliance Corporation), and Pasadena (added January 2025 via the Orswell & Kasman merger) — and maintains the State of Washington PLIA heating oil tank certification.

The business is professional services revenue earned on a project basis, with fixed pricing offered for Phase I ESAs (and lower-cost transaction screen and SBA-compliant RSRA alternatives) and quote-based pricing for remediation, Phase II investigations, PCAs, and specialized work. Go-to-market is sales-led, combining a website quote request funnel (dirtyproperty.com) with direct outreach to property owners, developers, lenders, Fortune 100 companies, government agencies, real estate transaction professionals, and small business operators across California, the Pacific Northwest, and other U.S. metros. Marketing relies primarily on educational content (blog, podcast appearances) and industry events such as the Long Beach Commercial Real Estate Council and Southern California Commercial Real Estate Lending Conference. The combined firm operates with approximately 21 employees and revenue described qualitatively as "in the seven figures."

Name

McAlister GeoScience, Inc.

Legal name

McAlister GeoScience, Inc.

Website

https://dirtyproperty.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

1–10 employees

Short description

McAlister GeoScience is a privately held environmental consulting firm providing Phase I/II Environmental Site Assessments, site remediation, vapor intrusion, and regulatory closure services to property owners, developers, lenders, government entities, and Fortune 100 companies across California and the Pacific Northwest.

Ownership category

akta.pro rank

Product category

Environmental Consulting Services

NAICS

Environmental Consulting Services (54162), Environmental Consulting Services (541620)

SIC

Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB)

Keywords

• Environmental site assessments
• Phase I ESA services
• Phase II ESA services
• Soil groundwater remediation
• Property condition assessments

Headquarters

HQ city

Long Beach

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations

Revenue model

1. Environmental Consulting Services: Professional consulting fees for Phase I/II ESAs, remediation planning, asbestos surveys, property condition assessments, and technical memorandums. Fixed pricing offered for Phase I assessments with fast turnaround times.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

McAlister GeoScience is an environmental consulting firm that provides Phase I and Phase II Environmental Site Assessments (ESAs), site remediation planning, and regulatory closure services for property owners, developers, lenders, and real estate transaction professionals. The firm leverages a multi-discipline team of geologists, engineers, and environmental toxicologists to deliver due diligence reports, vapor intrusion assessments, methane surveys, asbestos/lead-based paint inspections, and Property Condition Assessments primarily across the Western U.S.

Product overview

McAlister GeoScience is an environmental consulting firm offering a comprehensive suite of assessment and remediation services organized around Phase I and Phase II Environmental Site Assessments as the core offerings. The portfolio includes site remediation, property condition assessments, vapor intrusion assessments, methane surveys, and hazardous building materials surveys (asbestos/lead-based paint). Additional services include transaction screen assessments, SBA-compliant Records Search with Risk Assessment, and Washington State PLIA-certified heating oil tank services. Following the acquisition of Orswell & Kasman, Inc., the firm also provides access to an in-house regulatory database of Fire Insurance Maps and Aerial Photographs maintained for over 30 years. The company operates offices in Long Beach, CA and Seattle, WA.

Differentiator

Problem solved

Functional benefit

Products and services

• Phase I Environmental Site Assessments (ESAs)

Quantifiable outcome

• Over 13,000 environmental reports completed by Orswell & Kasman
• +2 more outcomes

Named customers9 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered strategic and core.

• EcoVironment Consulting GroupstrategicStrategic or Co-development Partner · 18 August 2023New strategic partnership announced August 2023 allowing McAlister GeoScience to provide enhanced Health & Safety, Compliance, and Sustainability services to expanding client base. Partnership enables EcoVironment Consulting Group to provide site investigation, remediation, and agency interaction services to their clients.
• Qualified ContractorscoreOthersPartnership with qualified contractors for drilling, laboratory work, and system installation & operation during remediation projects
• Certified LaboratoriescoreOthersPartnership with certified laboratories allowing McAlister GeoScience to obtain quality results for all project types
• Mark SputecoreOthersTeaming with Mark Spute for Property Condition Assessments (PCAs), adding specialized expertise to McAlister GeoScience's service offerings

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Tetra Tech: Large environmental and engineering consulting firm; another former employer of McAlister's founder, with deep practices in site assessment, remediation, and water/environmental services overlapping McAlister's core offerings.
• WSP: Major engineering and environmental consultancy offering Phase I/II ESAs, remediation, and environmental due diligence as part of a broader Earth & Environment practice serving CRE, energy, and government clients.
• AECOM: Global infrastructure and environmental consulting firm with extensive site investigation, remediation, and due diligence capabilities that compete for the same enterprise and government environmental work.
• Arcadis: Global design and consultancy firm with a sizable environment practice covering site assessment, remediation, and ESG advisory — comparable end markets and service lines to McAlister at much larger scale.
• Ramboll: International engineering and environmental consultancy with a strong site investigation and contaminated-land practice, often competing for the same Fortune 500 environmental programs as McAlister.
• ERM (Environmental Resources Management): Global environmental consulting giant and direct former employer of McAlister's founder; offers Phase I/II ESAs, site investigation, and remediation at much larger scale, competing for the same Fortune 500 and CRE clients.

Direct peers

• Brown and Caldwell: Employee-owned environmental engineering and consulting firm with site investigation, remediation, and compliance practices serving municipal, industrial, and private-sector clients across the western US.
• SCS Engineers: Environmental engineering and consulting firm focused on solid waste, site remediation, and contaminated land services; comparable in size and service mix to McAlister's site investigation and remediation work.
• Haley & Aldrich: US-based environmental and geotechnical consulting firm of similar size and ethos to McAlister; provides Phase I/II ESAs, site investigation, vapor intrusion, and remediation to CRE, industrial, and public-sector clients.
• Partner Engineering and Science: National firm specializing in Phase I ESAs, Property Condition Assessments, and environmental due diligence for commercial real estate transactions — directly overlapping McAlister's CRE-focused GTM.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/mcalister-geoscience

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries2 records

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 McAlister GeoScience, Inc.