MSE Group
MSE Group, operating as Onterris (formerly Montrose Environmental Group), is a global environmental solutions firm delivering consulting, testing, and remediation services across the U.S., Canada, and Australia for chemical, energy, government, infrastructure, manufacturing, mining, solid waste, technology, and transportation clients.
- Company typePrivate
- Founded2002
- HeadquartersOrlando, United States
- Headcount51–100
- GTM typeB2B
- OfferingServices
What MSE Group does
MSE Group, publicly operating under the Onterris brand following its 2025 rebrand from Montrose Environmental Group, is a global environmental solutions company delivering an integrated portfolio of consulting, testing, and remediation services across the full environmental lifecycle. The firm's nine core solution lines are Contaminated Land & Remediation, Permitting & Compliance, Planning/Preparedness/Response & Recovery, Health/Safety & Chemistry, Testing & Analysis, Water Consulting/Testing & Treatment, Community Resiliency, Natural Resources, and Treatment Technologies, with featured capabilities including Emergency Response, Stack Testing, Leak Detection and Fugitive Emissions Management, and accredited Laboratory Services. Delivery is built on teams of scientists, engineers, field technicians and consultants applying systems thinking that unites science, data and practical expertise across diverse geographies and regulatory environments.
The company serves nine primary industry verticals — Chemical, Energy, Government, Infrastructure, Manufacturing, Mining & Minerals, Solid Waste, Technology & Digital Infrastructure, and Transportation — across the United States, Canada, and Australia. Its revenue model is professional-services based, monetized through enterprise engagements, field testing programs, laboratory analysis, and compliance/permitting support delivered via direct client engagement, website-driven quote requests, and a dedicated client portal; pricing is not publicly disclosed and is negotiated per engagement. Commercial outreach is multi-channel, combining organic social (LinkedIn, X/Twitter, YouTube), a thought-leadership content engine ("Our Thinking" blog and the Onterris Outlook Report), email newsletter distribution, and a post-sale client portal, with topical focus on PFAS, methane, climate, energy efficiency and emerging contaminants timed to upcoming federal regulatory cycles.
A data quality caveat applies: the firmographic record labels the entity "MSE Group" in Orlando with 51-100 employees and a 2002 founding year providing construction, environmental, engineering, health and safety services, while the detailed operational data describes a much larger, tri-country, publicly visible firm with an investor-relations site. The substantive analysis above is grounded in the detailed Onterris/Montrose data; the firmographic fields may reflect an outdated, mis-attributed, or differently scoped record.
MSE Group firmographics
Firmographics- Name
- MSE Group
- Legal name
- Onterris, Inc.
- Website
- https://msegroup.com
- Company type
- Private
- Founded year
- 2002
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- MSE Group, operating as Onterris (formerly Montrose Environmental Group), is a global environmental solutions firm delivering consulting, testing, and remediation services across the U.S., Canada, and Australia for chemical, energy, government, infrastructure, manufacturing, mining, solid waste, technology, and transportation clients.
- Ownership category
- akta.pro rank
MSE Group industry classification
Industry- Product category
- Environmental Services
- NAICS
- Environmental Consulting Services (541620), Remediation Services (56291), Testing Laboratories and Services (54138), Environmental Consulting Services (54162)
- SIC
- Services-Engineering Services (8711), Services-Testing Laboratories (8734), Services-Commercial Physical & Biological Research (8731)
- akta.pro primary industry
- Site Assessment & Remediation (Phase I/II, Cleanup Oversight) (BPAHAJAC)
- akta.pro secondary industries
- Feasibility Studies & Remedial Design/Engineering (FS/RD, Treatability Testing) (EUAIALAB), Water, Wastewater & Stormwater Compliance (BPAHAJAJ)
Keywords
Where MSE Group is headquartered
LocationHeadquarters
- HQ city
- Orlando
- HQ country
- United States
- HQ region
- North America
Offices3 records
Markets served
MSE Group business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Environmental Consulting and Analytical Services: Environmental services including air quality monitoring, emissions testing, environmental consulting, analytical services and regulatory compliance support delivered through professional services engagement.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels6 records
MSE Group product offering
Product offeringCore offering
MSE Group provides integrated environmental solutions combining science, data, and practical expertise. Core offerings span contaminated land remediation, regulatory permitting and compliance, planning/emergency preparedness and response, occupational health and safety chemistry, environmental testing and analysis, water consulting/testing/treatment, community resiliency, natural resources management, and advanced treatment technologies. Services are delivered by scientists, engineers, field teams and consultants to industrial, government and infrastructure clients across the U.S., Canada and Australia.
Product overview
MSE Group, now operating as Onterris (formerly Montrose Environmental Group), is a global environmental solutions company offering an integrated portfolio of consulting, testing, and remediation services. The company provides nine core solution areas covering the full environmental lifecycle: Contaminated Land & Remediation, Permitting & Compliance, Planning/Preparedness/Response & Recovery, Health/Safety & Chemistry, Testing & Analysis, Water Consulting/Testing & Treatment, Community Resiliency, Natural Resources, and Treatment Technologies. Key service offerings include Emergency Response, Stack Testing, Leak Detection, and Laboratory Services. The company serves diverse sectors including Chemical, Energy, Government, Infrastructure, Manufacturing, Mining & Minerals, Solid Waste, Technology & Digital Infrastructure, and Transportation. Services are delivered through scientists, engineers, field teams, and consultants applying systems thinking that unites science, data, and practical expertise.
Differentiator
Problem solved
Functional benefit
Products and services
- Contaminated Land & Remediation Environmental remediation services for contaminated land, helping organizations address soil and groundwater pollution through scientific assessment and cleanup solutions. Targeted at industrial, government and infrastructure clients needing site cleanup.
- Permitting & Compliance Regulatory permitting and compliance support services helping clients navigate environmental regulations and obtain necessary approvals across multiple jurisdictions.
- Planning, Preparedness, Response & Recovery Emergency response and disaster preparedness services including planning, training, and rapid deployment for environmental incidents, with field personnel and equipment for emergency operations.
- Health, Safety & Chemistry Occupational health and safety consulting combined with chemical analysis services for industrial clients.
- Testing & Analysis Comprehensive environmental testing and analytical services including stack testing, source emissions testing, leak detection, fugitive emissions management, and laboratory analysis for industrial facilities.
- Water Consulting, Testing & Treatment Water quality consulting, testing, and treatment solutions for industrial, municipal, and commercial applications.
- Community Resiliency Services focused on building community resilience against environmental risks and climate-related challenges for government and infrastructure clients.
- Natural Resources Assessment and management of natural resources including wildlife, wetlands, and ecological systems for government and infrastructure clients.
- Treatment Technologies Advanced treatment technologies for environmental remediation including innovative approaches for contaminated media.
Companies that use MSE Group
Customer profileSegments9 records
Ideal customer profiles3 records
MSE Group technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
MSE Group partnerships and signals
Strategic signalScale indicators1 record
Recent moves5 records
Expansion highlights5 records
MSE Group competitors and assessment
Company assessmentDirect peers
- GHD: Global engineering, architecture, and environmental consulting firm with deep water, remediation, and compliance practices; competes head-to-head with Onterris in Australia and North America.
- Ramboll: Engineering, architecture, and consulting group with a strong environment and health practice, including contaminated site remediation and water—comparable to Onterris's environmental solutions mix.
- Tetra Tech: Global consulting and engineering firm with a leading environmental services practice covering water, remediation, and compliance—directly comparable to Onterris's contaminated land, water consulting, and permitting offerings.
- Arcadis: International design and consultancy with a sizable environmental and water business serving industrial and government clients—overlaps with Onterris's environmental consulting, water, and remediation portfolio.
- Haley & Aldrich: U.S. environmental and geotechnical engineering consultancy focused on contaminated site assessment, remediation, and EH&S—directly comparable to Onterris's remediation and compliance portfolio in the U.S. market.
- SLR Consulting: Environmental and advisory consultancy covering permitting, impact assessment, remediation, and EH&S—directly comparable to Onterris's mid-market environmental services offering.
- ERM (Environmental Resources Management): Pure-play global environmental, health, safety, and sustainability consultancy serving the same industrial verticals as Onterris (Chemical, Energy, Mining) with a similar 'systems' advisory model.
Broad incumbents
- AECOM: Mega-cap infrastructure and environmental services firm that competes with Onterris on large remediation and compliance programs, though as part of a much broader portfolio than Onterris's environmental focus.
- Stantec: Engineering, architecture, and environmental services firm with strong North American water and environmental practices—comparable to Onterris's water consulting and permitting/compliance solutions.
- WSP Global: Global professional services firm with a substantial environment and earth sciences practice (including acquired Wood E&IS)—overlaps with Onterris on environmental consulting and remediation but at significantly larger scale.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
MSE Group social profiles
Digital presenceMSE Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
MSE Group leadership team
Management profileNumber of profiles
MSE Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
MSE Group M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about MSE Group
What does MSE Group do?
MSE Group provides integrated environmental solutions combining science, data, and practical expertise. Core offerings span contaminated land remediation, regulatory permitting and compliance, planning/emergency preparedness and response, occupational health and safety chemistry, environmental testing and analysis, water consulting/testing/treatment, community resiliency, natural resources management, and advanced treatment technologies. Services are delivered by scientists, engineers, field teams and consultants to industrial, government and infrastructure clients across the U.S., Canada and Australia.
Is MSE Group a public or private company?
MSE Group is a private company. It is classified as unknown and is currently operating.
When was MSE Group founded?
MSE Group was founded in 2002. It employs 51 to 100 people.
Where is MSE Group based?
MSE Group is headquartered in Orlando, United States, in the North America region.
How does MSE Group make money?
One revenue line is on record: environmental Consulting and Analytical Services.
Who are MSE Group's main competitors?
Direct peers on record are GHD, Ramboll, Tetra Tech, Arcadis, Haley & Aldrich, SLR Consulting and ERM (Environmental Resources Management). Broad incumbents are AECOM, Stantec and WSP Global.
Does MSE Group have an API?
No public API is recorded for MSE Group.
What industry is MSE Group in?
MSE Group's product category is Environmental Services. Its primary akta.pro industry code is BPAHAJAC, Site Assessment & Remediation (Phase I/II, Cleanup Oversight), with a secondary code of EUAIALAB, Feasibility Studies & Remedial Design/Engineering (FS/RD, Treatability Testing). Its NAICS code is 541620 and its SIC code is 8711.