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Olson Environmental is now Riparia Environmental – delivering the same trusted service with a fresh new look.

Three field workers in front of the Riparia truck following a hydroseeding project

WHO WE ARE

We’re an integrated team of environmental services professionals with the deep environmental expertise and technical capabilities to meet the ecological and regulatory requirements of each project. We bring integrity, experience, and a strong work ethic to every job, from small-scale wetland enhancements to large-scale forest restoration initiatives.

That’s what we do. Here’s who we are:

We’re hikers, bird lovers, problem solvers, tall boot-waders, wetlands wanderers, river swimmers, and decent fly fishers. We love getting muddy as much as we love to support your projects, whether it’s finding solutions to complex problems, helping you navigate the murky waters of permitting, or just planting trees to improve a habitat.

LEADERSHIP

  • Tommy Miller Headshot
    Tommy Miller
    Operations Manager

    Tommy has over 15 years of experience in environmental restoration, permitting, and sediment control. He leads restoration projects with a strong commitment to environmental stewardship. As a CESCL-certified professional, Tommy focuses on sustainable solutions that balance ecological needs with project goals.

  • Stormwater Project Manager Nick Curcio
    Nick Curcio
    Senior Stormwater Project Manager

    Nick brings seven years of experience in stormwater and environmental services across the Pacific Northwest. As Senior Stormwater Project Manager, he is dedicated to helping clients navigate stormwater management and compliance while protecting our waterways.

    With a deep passion for sustainable solutions, Nick is expanding Riparia’s stormwater services and leading projects that support diverse clients and communities. His expertise strengthens our commitment to environmental stewardship and innovative problem-solving.

  • Cameron Tilley Headshot
    Cameron Tilley
    Stormwater and Restoration

    Cameron has eight years of experience and a passion for solving environmental challenges, particularly in stormwater management and wetland and habitat restoration.

  • Ryon Foster-Edwards Headshot
    Ryon Foster-Edwards
    Stormwater Analyst

    Ryon has 19 years of experience in water quality, including 10 years in public sector regulatory compliance and environmental enforcement. He brings practical skills in field assessments, stormwater restoration plans, and watershed-level water quality investigations.

CREW LEADS

  • Austin Ada Headshot
    Austin Ada
    Restoration

    With a background in Earth and Environmental Science and experience in invasive species survey and treatment, Austin contributes valuable skills in environmental restoration, noxious weed management, and community outreach.

  • Jaci Jones Headshot
    Jaci Jones
    Restoration

    Jaci is a student pursuing a bachelor’s degree in Earth and Environmental Science. With two years of experience in wetland restoration and mitigation, she is passionate about protecting and enhancing natural ecosystems through hands-on planting projects. She is committed to creating a sustainable future through education, advocacy, and community engagement.

  • Joshua Roark Headshot
    Joshua Roark
    Stormwater Crew Leader

    Joshua has five years of experience in stormwater management and vegetation control. Known for his hands-on approach and attention to detail, he ensures that projects are completed efficiently and sustainably.

  • Bailey Deming Headshot
    Bailey Deming
    Certified Erosion and Sediment Control Lead

    With a background in environmental science, Bailey has experience in planting, stormwater maintenance, landscaping, riparian restoration, and noxious weed control.

  • Alex Chriss Headshot
    Alex Chriss
    Stormwater

    Alex brings 10 years of excavating experience and leads his crew of stormwater specialists with a hands-on approach.

ADDITIONAL EXPERTISE

  • Kristen Currens Headshot
    Kristen Currens
    Environmental Science and Permitting Manager, PWS

    Kristen is a Professional Wetland Scientist with experience in the Pacific Northwest since 2004. She leads the environmental science and permitting team at MacKay Sposito, specializing in natural resource permitting and balancing built and natural environments.

  • Alexis Casey Headshot
    Alexis Casey
    Senior Environmental Scientist / Team Lead

    Alexis specializes in permitting complex projects throughout Washington and Oregon. As the team’s Endangered Species Act expert, she works with engineers to minimize the impact of stormwater runoff pollutants on native salmon species.

  • Chad McMurry Headshot
    Chad McMurry
    PE, Senior Stormwater Engineer

    Chad is a Professional Engineer with over 30 years of experience in stormwater facility design, habitat restoration, site development, and municipal utility projects. He works with owners and regulators to find and permit solutions to stormwater challenges in Washington and Oregon.

The completed road, landscaping, and walking trails at one of MacKay Sposito's projects with Mt. Rainier in the background
MacKay Sposito Logo

With more than 50 years of experience, MacKay Sposito is a multidisciplinary firm based in Vancouver, Washington, specializing in public works, energy, and land development. Our passionate team focuses on building lasting relationships through quality work, creative design, and collaboration. We offer civil engineering, land surveying, environmental science and permitting, landscape architecture, and construction management and inspection services. With the addition of our subsidiary, Riparia Environmental, we now deliver a full suite of services from design and engineering to maintenance and environmental compliance. Together, we balance development with environmental stewardship and sustainability.

WHAT WE DO

We offer a full range of natural resource-based environmental services for residential, commercial, public works, and retail development. Choose a service badge below to learn more.