Orswell & Kasman

What Orswell & Kasman does

Orswell & Kasman, Incorporated is a California-based environmental consulting firm founded in 1990 that specializes in environmental due diligence for property transactions, lenders, and property owners. The firm's core service offering centers on Phase I Environmental Site Assessments (ESAs) conducted to ASTM E1527-21 and AAI standards, complemented by Environmental Transaction Screens, Limited Transaction Analysis, Historic Use and Environmental Records Research reports, SBA-compliant Records Search with Risk Assessment, and hazardous building materials inspections covering asbestos, lead-based paint, and mold. All inspections are performed by experienced ASTM Environmental Professionals, and the firm delivers reports on a fixed-price basis with fast turnaround and lender-approved reporting.

The firm's most distinctive technical asset is an in-house, curated regulatory database that has been continuously maintained for over 30 years to support its SBA-compliant Records Search with Risk Assessment service. Over the course of its more than 35-year operating history, Orswell & Kasman has completed 13,000+ environmental reports, establishing a track record that anchors its lender and SBA-facing value proposition. The firm operates primarily within California with a regional delivery model and a quote-based engagement funnel accessible through its website.

In 2026, Orswell & Kasman was officially acquired by McAlister GeoScience, becoming a wholly-owned subsidiary under a combined entity that markets "turn-key solutions for complex sub-surface challenges." The combined platform integrates Orswell & Kasman's Phase I/II ESA and hazardous building materials services with McAlister's subsurface assessment and remediation capabilities. Prior to the acquisition, the firm operated as a privately held California corporation serving property buyers and sellers, lenders and financial institutions, and property owners/managers on a professional services fee basis with no disclosed funding rounds, external investors, or AI/ML technology stack.

Name

Orswell & Kasman

Legal name

Orswell & Kasman, Incorporated

Website

https://orswell-kasman.com

Company type

Private

Founded year

1990

Operating status

Acquired

Headcount range

11–50 employees

Short description

Orswell & Kasman is a California-based environmental consulting firm specializing in Phase I/II Environmental Site Assessments, SBA-compliant Records Search with Risk Assessment, and hazardous building materials inspections for property transactions, lenders, and property owners.

Ownership category

akta.pro rank

Headquarters

HQ city

Long Beach

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Environmental Consulting Services: Professional consulting fees for Phase I/II Environmental Site Assessments, transaction screens, historic use research, records search with risk assessment, and hazardous building materials inspections (asbestos, lead-based paint, mold). Services are provided on a fixed pricing basis with fast turnaround times.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels1 record

Core offering

Orswell & Kasman provides environmental consulting and due-diligence services for property transactions and lenders, anchored by Phase I Environmental Site Assessments (ASTM E1527-21 / AAI), environmental transaction screens, historic use and records research, SBA-compliant Records Search with Risk Assessment using an in-house regulatory database maintained for over 30 years, and add-on hazardous building materials inspections (asbestos, lead-based paint, mold). Services are delivered on a fixed-pricing, fast-turnaround basis performed by ASTM Environmental Professionals.

Product overview

Orswell & Kasman, Inc. is an environmental consulting firm providing turn-key solutions for complex sub-surface challenges. The company offers a comprehensive suite of environmental assessment services built around Phase I Environmental Site Assessments (ESAs) using ASTM E1527-21 and AAI standards, complemented by Environmental Transaction Screens, Historic Use and Environmental Records Research, and SBA-compliant Records Search with Risk Assessment using an in-house regulatory database maintained for over 30 years. Additional hazardous building material inspection services include asbestos, lead-based paint, and mold assessments. Services are characterized by fixed pricing, fast turnaround times, lender-approved reporting, and inspections performed by experienced ASTM Environmental Professionals.

Differentiator

Problem solved

Functional benefit

Products and services

• Phase I Environmental Site Assessments (ESAs) Phase I Environmental Site Assessments conducted to ASTM E1527-21 and AAI standards, identifying potential environmental contamination risks associated with a property; used by property buyers, sellers, and lenders for property transactions and loan approvals.
• Environmental Transaction Screens and Limited Transaction Analysis Streamlined environmental screening services for property transactions, providing preliminary environmental risk evaluation for real estate deal parties.
• Historic Use and Environmental Records Research Reports Research reports analyzing historical land use and environmental records to identify potential contamination sources for properties.
• Records Search with Risk Assessment (SBA-compliant) SBA-compliant records search and risk assessment utilizing an in-house curated and maintained regulatory database built over 30 years, provided to lenders and SBA-compliant loan transactions.
• Asbestos, Lead-Based Paint, and Mold Inspections Hazardous building materials inspection services including asbestos surveys, lead-based paint assessment, and mold evaluation for commercial and residential property owners.

Quantifiable outcome

• 13,000+ environmental reports completed over 35+ years of operation
• +1 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• McAlister GeoSciencecoreStrategic or Co-development Partner · 1 January 2024McAlister GeoScience completed the official acquisition of Orswell & Kasman, Inc. The merger brings together Orswell & Kasman's 35+ years of environmental consulting expertise and 13,000+ completed reports with McAlister GeoScience's capabilities. The combined entity offers Phase I/II Environmental Site Assessments, hazardous building materials inspections, and remediation services as turn-key solutions for complex sub-surface challenges.

Scale indicators3 records

Recent moves3 records

Expansion highlights3 records

Direct peers

• AEI Engineering: Environmental and engineering consultancy providing Phase I ESAs, property condition assessments, and hazardous materials surveys to real estate transaction and lender clients in the Western U.S.
• Partner Engineering and Science: National environmental and engineering consulting firm offering Phase I/II ESAs, transaction screens, and lender-driven due diligence to the same property transaction, lender, and commercial real estate clients that O&K serves.
• Hillmann Consulting: National environmental, building sciences, and property condition consulting firm serving commercial real estate owners, lenders, and investors with Phase I ESAs, hazmat surveys, and due diligence—direct overlap with O&K's service lines.
• EBI Consulting: Multi-disciplinary environmental and building consulting firm providing Phase I ESAs, asbestos/lead/mold surveys, and lender due diligence to commercial real estate and lending clients—directly overlapping O&K's core service mix.

Broad incumbents

• McAlister GeoScience: Parent company of Orswell & Kasman since 2026. McAlister GeoScience provides environmental consulting focused on subsurface/soil and groundwater assessment and remediation in California, with a turn-key service model that closely complements O&K's Phase I/II ESA and hazardous building materials practice.
• Apex Companies: Large environmental and water resources consulting firm offering Phase I/II ESAs, compliance, and remediation services across the U.S., providing scale-based competition to O&K in California.
• Atlas Technical Consultants: National provider of professional technical and consulting services, including environmental due diligence, Phase I/II ESAs, and building sciences for real estate and infrastructure clients.
• Terracon Consultants: One of the largest U.S. environmental and geotechnical consulting firms, offering Phase I/II ESAs, hazardous materials, and remediation services at national scale—a key competitive benchmark for O&K's regional offering.

Regional players

• Atlantic Environmental Solutions: Northeast U.S.-based environmental consulting firm specializing in Phase I ESAs, transaction screens, and hazardous materials inspections for property transactions—comparable in scope to O&K but operating in a different geography.

Emerging players

• Land Environmental & Geological Services (LEGS): Smaller environmental consulting firm offering Phase I ESAs, subsurface investigation, and geotechnical services, with comparable service breadth to O&K though smaller in scale.

Market position

Strengths4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

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 Orswell & Kasman