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.
Employee Spotlight

Preserving The Past While Building the Future

For archaeologist Gabriel Robles, Catalina Island, California, is home and a landscape rich with thousands of years of cultural history. See how he works alongside project teams, tribal groups and the City of Avalon to protect cultural resources while helping essential infrastructure move forward responsibly.
Gabe in a high-visibility vest overlooks a coastal harbor and mountains.
Gabe Robles - For Planet & Progress
Gabe Robles sifts soil at an outdoor archaeological monitoring site.
CULTURAL RESOURCE MANAGEMENT

Balancing cultural preservation and community needs

On the City of Avalon’s Five Corners infrastructure improvement project, archaeological monitoring helps identify sensitive areas and minimize impacts to Catalina Island’s cultural resources.

With 25 years of experience and a lifelong connection to the island, Gabriel helps teams respond quickly when cultural materials are encountered so work can continue responsibly.

Through careful recovery, tribal consultation and respectful reinterment, our Cultural Resource Management team helps ensure ancestral and cultural materials are treated with dignity while meeting complex regulatory requirements. In states such as California, where cultural resource and tribal consultation laws are particularly stringent, early planning and proactive coordination are essential to project success. By incorporating these considerations into project planning and permitting, Onterris helps communities meet today’s needs while preserving history for future generations.
When work goes well, I feel that I’ve done something to help protect and preserve a little slice of history that not many people get to see. I’m not just protecting the past, I’m helping shape how we move forward.
Gabriel Vitre Robles, Archaeological Monitor, Onterris

Explore Our Thinking

Why Early Site Due Diligence Matters for Greenfield Renewable Projects

For renewable energy developers, early assessments identify environmental risk and set the foundation for successful, sustainable and cost-saving developments

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

Environmental Permit Compliance Starts with Simpler Tasks

Companies improve compliance and reduce risk when they move permit requirements out of silos and into everyday operations

Defending Community Air Quality for Clark County

VOC fingerprinting and lab validation identify wildfires as a driver of air quality exceedances

Battery Storage Is Becoming the Grid’s Reliability Backbone

Speed will strengthen reliability and flexibility will drive long-term advantage

Long-Term Housing Planning Is Key to Successful Disaster Recovery

Housing decisions shape recovery long before rebuilding begins

Protecting Katherine’s Drinking Water

Proven PFAS treatment technology restores water confidence and protects long-term supply

How to Revitalize Abandoned Properties

Learn how communities can revitalize abandoned properties through adaptive reuse, infill, redevelopment, environmental planning and funding strategies.