Who We Are
Onterris is a global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect.
Sectors
Access deep environmental expertise tailored to your industry, with solutions built for real-world conditions.
Solutions
Prepare for escalating environmental risks with expert solutions designed to perform under pressure.
Our Thinking
Explore briefs, perspectives and articles that turn insight into action. Discover thought leadership that informs decisions and drives impact. See the ideas shaping environmental solutions and guiding your next move.
Cuture & Careers
Where brilliant people come together to turn environmental science into real-world progress for communities, industry and the planet.

Professional Services

Independent environmental insight for technical, legal and financial advisors navigating complex environmental compliance and regulatory requirements.
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Environmental scientist analyzing monitoring data in a mobile laboratory
INTRO

Environmental clarity for high-stakes decisions

Environmental risk, regulatory obligations and the demand for scientific evidence increasingly shape transactions, infrastructure investments, litigation and corporate strategy. Professional advisors must interpret complex environmental information with confidence and credibility.

Our experts support environmental compliance, due diligence and risk management through defensible science, environmental monitoring programs and regulatory advisory.

By delivering independent analysis and reliable data, we help advisors strengthen technical arguments, interpret regulatory expectations and guide responsible environmental decisions.
Why it matters

Regulatory scrutiny is raising the stakes for environmental risk decisions

Regulators, investors and courts increasingly expect environmental risks to be assessed, interpreted and disclosed with clear, credible scientific evidence. Transactions, infrastructure investments and development projects depend on defensible environmental analysis and reliable data.

Issues such as contamination, emissions, water quality and emerging contaminants can quickly affect regulatory compliance, project viability and financial exposure. Organizations that understand environmental conditions early can interpret risk clearly, strengthen due diligence and guide decisions with greater confidence.
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Laboratory scientist working at a computer workstation

The expertise behind defensible environmental evidence

Our scientists, engineers and regulatory specialists deliver integrated analysis, measurement and interpretation solutions that strengthen environmental investigations, regulatory submissions, due diligence and technical reporting.
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Environmental advisory expertise

Explore our integrated environmental capabilities that support compliance consulting, environmental due diligence, risk assessment and regulatory advisory across complex projects.
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Health, Safety & Chemistry

Bringing scientific precision to critical decisions
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Emerging Contaminants

Identify, assess and manage PFAS and other emerging contaminants with advanced science, regulatory insight and integrated environmental solutions.
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Methane Monitoring & Management

Detect, quantify and manage methane emissions with advanced measurement technologies, defensible data and regulatory expertise.
CATEGORY

Meet your Professional Services lead

We help advisors turn complex environmental science into clear, critical and actionable insight. Speak with our team to learn more.

Professional Services Spotlight

1,4-Dioxane and Specialty VOC Treatment

Regenerable adsorption designed for reliable treatment of complex organic contaminants

3D Visualization and Analysis

3D visualization and analysis reveal contaminant behavior, subsurface conditions and risk pathways to support better remediation planning and site decisions.

7 Things Data Center Operators Need to Know About Engine and Cogeneration Emissions Compliance

Field lessons for improving data quality, control performance and permitting decisions

A Smarter Air Permitting Strategy for a Texas Refinery

Strategic planning creates a more efficient permitting pathway and keeps critical refinery modernization on schedule

A Smarter Approach to Methane Management in Wastewater Treatment Plants

With better visibility into emissions, operators can act on high-impact leaks, reduce odor and strengthen maintenance outcomes

Accelerating Brownfield Readiness Across Remote Former Defense Sites

Grant strategy and field execution advanced cleanup planning for World War II legacy contamination on Alaska Native Corporation lands

Accelerating Remote Groundwater PFAS Treatment with Modular Systems

Compact deployment, remote operation and a reliable treatment design supported consistent PFAS treatment across six groundwater sites

Advancing Alberta’s Utility-Scale Solar and Storage Through Responsible Environmental Design

Tight coordination across siting, surveys and submissions kept delivery on track while prioritizing ecological outcomes

Advancing Brownfield Approvals to Restart Responsible Gold Production

Early regulator alignment and a coordinated approvals strategy cleared a practical pathway to restart operations and modernize closure planning on a legacy site