Our People

scan0007 We are always looking for exceptional professionals who are dedicated to advancing the science and practice of ecosystem restoration by applying technical and communication skills. 

While we are not currently seeking to hire  new employees, you are welcome to make an inquiry to us using the contact information provided on the Contact Us page.

It is the policy of Wolf Water Resources to treat all employees, clients, vendors, and applicants for employment with dignity and respect.





Marjorie Wolfe, PE, CFM -President, Water Resource Engineer
Marjorie Wolfe, PE water resources engineer
Marjorie received her degree in Bio-Resource Engineering from the University of British Columbia and spent a year at the University of Melbourne, Australia studying Hydrology & Hydraulics. She began her career with Canada’s Department of Fisheries & Oceans Salmonid Enhancement Program building spawning channels and rearing habitat in British Columbia. She then spent ten years in Montana working on both upland and riparian habitat restoration. As a Certified Floodplain Manager (CFM), she understands the necessity of protecting health and human safety while restoring the natural and beneficial function of floodplains. This understanding is reflected in her rigorous application of hydrologic and hydraulic modeling to both design and planning projects.

Marjorie worked for Clean Water Services and the City of Salem on public policy and innovative approaches to managing surface water. Her work in both the public and private sectors has provided a solid grounding in public relations and the integration of site specific project design with broad watershed wide planning objectives. This diverse background in water resource restoration, floodplain management, and stormwater design brings innovation to Marjorie’s design approach and an inherent understanding of multi-objective projects. Her passion and dedication is reflected in her work with professional associations such as River Restoration Northwest, and the ASCE Environmental Water Resources Group to raise the bar for professional standards by encouraging multidisciplinary collaboration and continuing education. Her free time is spent exploring local streams and forests with her dogs.


Jeremy Lowe -Senior Geomorphologist

Word-Jeremy LoweJeremy received his honors degree in Geography from the University of Hull. He is a renowned wetland and coastal geomorphologist specializing in ecosystem restoration and climate change adaptation. His 25 years of experience spans North America and Europe including flood hazard reduction in Venice Italy, tidal and wetland design guidelines for San Francisco Bay and the Lower Columbia River, and shoreline restoration in the Puget Sound. He also works at the San Francisco Estuary Institute in landscape resilience. Jeremy brings state of the art science to a practical and implementable level in ecosystem restoration and water quality projects.


Darlene Siegel, Aquatic Fisheries Biologist

Darlene Siegel Fish Biologist and Project ManagerDarlene specializes in aquatic ecosystem restoration projects and she has successfully led complex, multiple-objective projects from the feasibility through design phases. She has worked throughout estuarine, riverine, and wetland ecosystems, analyzing limiting factors, designing and conducting habitat assessment and valuation models, and developing biological design criteria to maximize project benefits and ecological uplift. She has built a strong reputation with her clients for her thorough knowledge of regulatory requirements and effectiveness at communicating with resource agencies, local jurisdictions, landowners, stakeholders, and the public to garner project support. Darlene’s regulatory permitting skills include environmental documentation for USACE Section 408, ESA, CWA, and NEPA.


Curtis Loeb, PE -Senior Water Resources Engineer
Curtis Loeb Engineer Lower ColumbiaOver the past 20 years, Curtis has practiced water resources engineering in watersheds across the country, with a focus on surface water systems in Washington, Oregon, and California. He has guided these projects from start to finish: from technical engineering analyses and planning, to design and permitting, and construction phases.

Curtis’ experience involves preparation of detailed designs, technical specifications, cost estimates, and construction plans and schedules. He has also conducted hydrologic, hydraulic, geomorphic, and sediment transport and water quality analyses to support restoration projects. Recently, he completed final designs and provided engineering support during construction of several large tidal wetland and floodplain habitat restoration projects along streams, rivers, and estuaries in the Pacific Northwest.


Amanda Jones, PE, ESCM, Water Resources Engineer

Dedicated to a career in water resources restoration, Amanda’s professional experience includes fluvial and tidal channel design, fish passage enhancement, culvert replacement, floodplain and stream restoration, stormwater management, and bank stabilization. She oversees the development of our project designs, construction documents, specifications, and cost estimates. As an ODOT-Certified Erosion and Sediment Control Manager (ESCM), Amanda has created many erosion and sediment control plans and 1200C permits.


Rowyn Cooper-Caroselli, Water Resources Engineering Tech 

Water resources engineer in training

Rowyn is a project engineer specializing in water quality and stream restoration design. His recent work as a watershed steward involved stream and water quality assessments, analysis, and report writing. He is trained as a Wilderness First Responder as well as in front country C.P.R./First Aid. His modeling capabilities include HEC-RAS, StormCAD, and EPAnet and he uses ArcGIS for data analysis and mapping. Rowyn has a diverse array of stream assessment and surveying skills including pace and compass, hand and auto level, total station, RTK, handheld GPS, laser range finding, discharge measurement, macro-invertebrate sampling, and particle counts. As an enthusiastic outdoorsman with a passion for rafting and kayaking he has developed an intimate understanding of river dynamics which he couples with his physical assessment skills to inform W2r projects.


Diedra Case, LEED AP Business Director

Diedra brings 14 years of experience in the Architecture and Engineering industry and public relations. While practicing landscape architecture, she managed domestic and internationally-located projects and performed a variety of business development activities including producing proposals, scopes of work, and participating in project presentations. She also served actively in several professional organizations to help local development projects happen more sustainably and to organize other community AE professionals toward improving public infrastructure. Transferring this set of experiences to her work as a communications professional, she planned events and managed media strategies throughout the United States for clients in the education and technology industries; and after returning to the A&E industry she has focused on business operations and management. She enjoys working with A&E professionals and integrating her passions for visual communication and information systems to create high quality project deliverables and efficient project processes.


Joe Rudolph, Landscape Ecologist and GIS Analyst

As a landscape ecologist Joe contributes to a variety of projects ranging from floodplain restoration studies to river restoration and bank stabilization design. He is well-versed in GIS environmental modeling and spatial analysis to support project studies and designs. He also performs wetland delineations and prepares technical reports, mitigation plans, and permitting documentation.


Cameron Bergen, MS -Soil and Wetland Scientist

Cameron BergenCameron provides project leadership for wetland determinations and delineations, mitigation design and monitoring, soil analysis and mapping, and erosion control plans. He received his Masters degree in crop and soil science and BS in Natural Resources and Geoscience  from Oregon State University. He brings extensive experience with surveying and monitoring, including plant surveys, hydrologic monitoring, and biological and geomorphic assessments. He has been certified in the use of the Oregon Rapid Wetland Assessment Protocol (ORWAP) since 2009.

In addition to his work to support river and floodplain habitat restoration, Cameron is experienced providing technical support for long-term scientific and environmental projects ranging from watershed studies, airshed analysis, long-term soil carbon respiration, and watershed scale geodatabase maintenance.


Terril Stevenson, PG – Fluvial Geomorphologist
Terril Stevenson, PG – Fluvial GeomorphologistTerril is a geomorphologist with over 35 years of experience in the US Federal Government–most recently as the regional fluvial geomorphologist and group lead for River Systems Analysis and Design at the Pacific Northwest Region of the US Bureau of Reclamation.  She is a licensed professional geologist in Oregon and Idaho. She brings extensive experience with geomorphic assessment, watershed and resource planning and stream restoration design and implementation.  Her expertise also includes environmental compliance, policy development, and partner and stakeholder relations.  She has worked throughout the western United States including Alaska, Washington, Montana, Oregon, Idaho, Nevada and Utah. Her professional experience is paired with a personal passion for the natural world and especially water.  She enjoys combining all of this as a kayaker and rafter, fish chaser, telemark skier, and mountain biker.