Business Details
22 Years
experience
Expert Environmental Engineering & Design Services in Bellevue, WA
Osborn Consulting is a team of over 100 creative professionals dedicated to delivering practical and innovative solutions for water and land infrastructure. Founded in 2004 by Tarelle Osborn, the firm has grown from a surface water industry leader to a multidisciplinary practice serving public agencies across the Pacific Northwest. Our expertise spans civil engineering, landscape architecture, urban design, and natural resource planning, with a focus on enhancing communities and ecosystems through sustainable practices. We value a collaborative team environment where diverse disciplines unite to solve complex challenges. With offices in Bellevue, Seattle, Spokane, Bellingham, and Vancouver, we combine local knowledge with technical excellence to address regional needs.Our core values emphasize employee growth, mentorship, and professional development, supported by annual salary reviews and flexible career paths. Clients trust our NASSCO-certified engineers and LEED-accredited professionals to navigate regulatory frameworks, deliver asset management programs, and implement green stormwater infrastructure. Projects range from fish passage restoration to public space design, reflecting our commitment to responsible engineering that balances anthropogenic, ecological, and geological considerations. As an employee-owned firm, we maintain a culture where creativity thrives, and every project contributes to building a more resilient future for both people and the environment.
Services
Stormwater Management
Natural Resource Planning
Landscape Architecture
Urban Design
Utility Infrastructure
Fish Passage Solutions
Asset Management
Site Development
Floodplain Management
Green Infrastructure
Details
- Year established: 2004
Highlights and features
- Over 100 creative professionals with NASSCO-certified engineers and LEED-accredited experts
- Employee-owned firm emphasizing mentorship, professional growth, and flexible career paths
- Comprehensive services spanning conceptual planning to construction support for infrastructure
- Specialized expertise in fish passage restoration, green stormwater systems, and asset management
- Deep regional knowledge serving public agencies across the Pacific Northwest
Services
Stormwater Management
We design green stormwater infrastructure and conventional drainage systems to mitigate flooding and enhance water quality. Our engineers implement conveyance designs, detention basins, and bioretention systems while complying with regulatory standards. Clients benefit from innovative solutions that balance urban development with ecological preservation.
Fish Passage Restoration
Our team specializes in removing barriers to aquatic migration through culvert replacements and stream restoration. By collaborating with regulatory agencies and tribal partners, we develop fish passage prioritization programs that improve biodiversity and support endangered species recovery in Pacific Northwest waterways.
Landscape Architecture
Osborn creates sustainable public landscapes integrating native vegetation and accessible design. Projects include parks, school campuses, and streetscapes emphasizing community engagement and low-impact development principles to ensure longevity and environmental harmony.
Utility Infrastructure
We assess and rehabilitate storm, sewer, and water systems using trenchless technologies and open-cut methods. Our NASSCO-certified engineers develop condition assessment programs to extend infrastructure lifespan while maintaining public health and safety.
Asset Management
Our asset management services optimize utility network performance through data-driven prioritization and lifecycle analysis. Municipal clients receive strategic repair and replacement plans to maximize budget efficiency and ensure resilient infrastructure for growing communities.
People
Tarelle Osborn
President and Principal Engineer
Founded Osborn Consulting in 2004, Tarelle leads with 20+ years of experience in surface water engineering and erosion control. She holds certifications in multiple states and prioritizes collaborative problem-solving to deliver sustainable infrastructure solutions.
Robert Parish
Director of Excellence and Innovation
With expertise in drainage and utility design, Robert drives technical innovation across practices. He ensures consistent delivery of quality engineering solutions while mentoring teams on complex municipal projects.
Liz Browning
Landscape Architecture Practice Lead
Liz specializes in public landscape design, combining 15+ years of experience with a master's degree in landscape architecture. Her projects emphasize sustainable materials and community-focused urban spaces that become civic landmarks.
Cheyenne Covington
Technical Service Manager
A stormwater technical lead with 12 years in infrastructure rehabilitation, Cheyenne combines engineering expertise with green infrastructure innovation. He holds certifications in erosion control and sustainable design practices.
Debbie Harris
Project Delivery Manager
With 20+ years managing $200M+ programs, Debbie specializes in utility and transportation infrastructure delivery. Her strategic approach balances fiscal responsibility with environmental stewardship for long-term community benefits.
Questions
What areas do you serve?
We operate across Washington State with offices in Bellevue, Seattle, Spokane, Bellingham, and Vancouver.
Do you work with public agencies?
Yes, we partner with cities, counties, ports, tribal nations, and state transportation departments on infrastructure projects.
What engineering certifications do your staff hold?
Our engineers maintain Professional Engineer licenses in multiple states and certifications from NASSCO and LEED.
How do you approach sustainable design?
We integrate green stormwater infrastructure, native vegetation, and low-impact development principles in all our projects.
Can you handle complex infrastructure rehabilitation?
Yes, our NASSCO-certified engineers specialize in assessing and rehabilitating aging storm, sewer, and water systems.
