What Alliance Technical Group does

Alliance Technical Group (ATG) is a U.S.-headquartered environmental compliance, testing, and monitoring services provider founded in 2000 and based in Decatur, Alabama. The company delivers a three-pillar service portfolio: Environmental Compliance consulting (regulatory strategy, compliance planning, assessment and remediation); On-Site Testing and Monitoring (source/stack testing, engine testing, RNG testing, continuous emission monitoring systems or CEMS, and fugitive emissions detection using LDAR and Optical Gas Imaging); and Laboratory Testing and Analysis (air, water, soil, and hazardous waste). The proprietary SkyBridge Software platform aggregates emissions data streams across multiple customer sites into a unified portfolio view, serving as the connective software layer for recurring monitoring engagements.

ATG operates through 60+ offices across the United States and Canada, deploying field-based engineers, scientists, and accredited technicians directly to client sites. Revenue is generated primarily through project-based professional services fees for testing and consulting engagements, supplemented by recurring revenue from CEMS/temp CEMS monitoring subscriptions and ongoing data management. The company serves twelve vertical markets including Energy & Power, Oil & Gas, Data Centers, Manufacturing, Pulp & Paper, Chemical & Processing, Building & Construction, Government & Institutions, Semiconductors, Renewable Natural Gas, Food & Consumer Goods, and Environmental & Waste Management. Pricing is quote-based and project-specific; no public pricing exists.

The company is privately held under Blackstone Energy Transition Partners as of January 2026, following a 2021 acquisition by Morgan Stanley Capital Partners that initiated a multi-year programmatic build-out. Under PE ownership ATG completed eight or more acquisitions between 2021 and 2025 — including Horizon Air Measurement, Air Quality Services, four environmental laboratories (2023), CEM Specialties Inc. (Canada, 2024), Chemtech Consulting Group, Civil & Environmental Consultants, and Global Analyzer Systems (2025) — transforming the business from a regional source testing firm into a North American multi-vertical environmental services platform. Leadership includes CEO Chris LeMay, Chairman Rob Langley, and Chief Commercial Officer Kim Van Soelen.

Name

Alliance Technical Group

Legal name

Alliance Technical Group

Website

https://alliancetechnicalgroup.com

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Alliance Technical Group is a U.S.-based environmental compliance, testing, and monitoring services provider serving energy, oil & gas, data center, manufacturing, and industrial clients across 60+ offices in the U.S. and Canada with source testing, CEMS, fugitive emissions detection, and laboratory analysis since 2000.

Ownership category

akta.pro rank

Product category

Environmental Testing and Compliance Services

NAICS

Testing Laboratories and Services (54138), Environmental Consulting Services (54162), Other Scientific and Technical Consulting Services (541690)

SIC

Services-Testing Laboratories (8734), Services-Engineering Services (8711), Oil & Gas Field Services, Nec (1389)

akta.pro primary industry

Leak Detection, Emissions & LDAR Testing (OGI, methane, fugitive emissions) (EUAEAHAL)

akta.pro secondary industries

Stack/Source Emissions Testing & CEMS Support (EUAHACAB), Air Quality & Emissions Management (BPAHAJAI), Site Assessment & Remediation (Phase I/II, Cleanup Oversight) (BPAHAJAC)

Keywords

• Air emissions testing
• Environmental compliance services
• Stack testing services
• Fugitive emissions monitoring
• Environmental laboratory analysis

Headquarters

HQ city

Decatur

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Environmental Testing Services: On-site testing and monitoring services including source testing, stack testing, engine testing, and fugitive emissions monitoring. Revenue generated through project-based fees for testing services.
2. Laboratory Testing & Analysis: Environmental laboratory analysis for air, water, soil, and hazardous waste samples. Revenue from sample analysis fees.
3. Environmental Compliance Consulting: Regulatory strategy development, compliance planning, and assessment & remediation services. Revenue from consulting engagement fees.
4. Continuous Monitoring Services: Ongoing CEMS/Temp CEMS monitoring services and data management subscriptions for regulatory compliance.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Alliance Technical Group provides on-site environmental testing and monitoring services, including source testing (stack testing, CEMS, engine testing, RNG), fugitive emissions detection (LDAR, OGI), and laboratory analysis for air, water, soil, and waste samples. The company also delivers environmental compliance consulting, regulatory strategy, assessment, and remediation services to industrial and institutional clients across North America. Services are delivered through a network of more than 60 offices in the United States and Canada and supported by the proprietary SkyBridge software platform for emissions data management.

Product overview

Alliance Technical Group provides environmental compliance, testing, and monitoring services as a unified portfolio of offerings. The company offers Environmental Compliance Services (consulting, compliance strategy, and remediation), On-Site Testing & Monitoring (source testing with stack testing, CEMS, engine testing, RNG capabilities, and fugitive emissions detection using LDAR and OGI technology including the SkyBridge Software platform), and Laboratory Testing & Analysis (environmental and oil & gas testing across air, water, soil, and waste media). These services are delivered through a network of over 60 offices across the United States and Canada, serving industries including energy, construction, manufacturing, oil and gas, data centers, and government institutions.

Differentiator

Problem solved

Functional benefit

Brands

• SkyBridge Software: Software platform for emissions monitoring and data management integrated into source testing services

Products and services

• Environmental Compliance Services Environmental consulting, compliance strategy, and assessment and remediation services that help industrial and institutional clients build regulatory strategy and meet environmental obligations.
• Source Testing Services On-site emissions testing including stack testing, CEMS and temporary CEMS, engine testing, and renewable natural gas (RNG) testing delivered to power, oil and gas, chemical, and industrial clients.
• Fugitive Emissions Services Monitoring and detection of fugitive emissions using ambient air monitoring, Leak Detection and Repair (LDAR) programs, and Optical Gas Imaging (OGI) technology for industrial sites.
• Laboratory Testing and Analysis Environmental and oil and gas laboratory testing of air, water, soil, and hazardous waste samples through a network of laboratory facilities across North America.

Quantifiable outcome

• Expanded capabilities in emissions measurement and regulatory compliance services in North America

Segments12 records

Ideal customer profiles4 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 moves7 records

Expansion highlights6 records

Direct peers

• Montrose Environmental Group: Public environmental services company providing air quality, emissions testing, environmental permitting, and compliance services across the U.S. — directly comparable service portfolio to Alliance's source testing, fugitive emissions, and consulting offerings.
• ERM (Environmental Resources Management): Global sustainability and environmental consultancy with deep EHS consulting, site assessment, and air quality practices. Closely comparable in EHS advisory and air quality services, though ERM is materially larger and globally diversified.
• Pace Analytical Services: U.S.-focused environmental testing laboratory network providing air, water, soil, and waste analysis. Directly comparable to ATG's Laboratory Testing & Analysis line and a likely roll-up candidate in the same fragmented market.

Broad incumbents

• Clean Harbors: Large publicly traded environmental services firm with environmental testing, field services, and waste management capabilities. Overlaps with ATG's environmental testing and waste-related laboratory services but is much broader in scope.
• Tetra Tech: Global consulting and engineering firm with a dedicated water, environment, and sustainable infrastructure practice. Comparable in environmental consulting and assessment services but operates at far larger scale and breadth than ATG.
• AECOM: Global infrastructure consulting firm with a large environment practice covering site assessment, remediation, compliance, and air quality — overlapping with ATG's assessment & remediation and environmental consulting services, but as part of a much wider portfolio.
• Eurofins Scientific: International testing laboratory group with a substantial environmental testing footprint (including former PACE and Lancaster Labs assets). Comparable in laboratory testing and analysis services, though Eurofins operates across food, pharma, and clinical testing as well.
• Bureau Veritas: Global testing, inspection, and certification (TIC) company with commodity, marine, and environmental testing lines. Comparable in third-party emissions testing and certification services for industrial clients, but operates at vastly greater scale.
• SGS SA: One of the world's largest TIC firms, offering environmental, industrial, and natural resource testing and inspection. Overlaps with ATG's stack testing, source emissions, and field inspection services, though SGS serves a global, multi-vertical customer base.
• ALS Limited: Public testing services company with a major environmental division providing air, water, soil, and stack testing. Comparable in environmental laboratory and source testing services but operates globally across mining, life sciences, and industrial asset care.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@AllianceTechnicalGroup
• LinkedInlinkedin.com/company/alliance-source-testing-llc
• Instagraminstagram.com/alliancetechnicalgroup

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries5 records

Funding overview

Funding rounds1 record

Investors1 record

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

M&A10 records

Investments

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

Frequently asked questions about Alliance Technical Group