Seattle Office

Where the Mountains meet the Sound

Herrera is rooted in Seattle and many of us make our homes in communities here.

Our 60-person Belltown office is surrounded by major urban revitalization.

Exploding population growth in the midst of rich water resources creates many challenges – here we design our resilient future.


2200 Sixth Avenue
Suite 1100
Seattle, WA 98121

Driving Directions
Biking Directions



Point of Contact

Alice Lancaster

Alice Lancaster, PE

Principal Engineer, Water Practice Director, Seattle Regional Director

Brian Scott

Senior River Restoration Engineer

Bruce Carpenter

Senior Hydrogeologist

Carol Slaughterbeck, PE, PMP

Chief Financial Officer

Charlie Maloof

Project Accountant

Christina Merten, PE, PWS

Principal Ecologist, Associate Restoration Practice Director

Dylan Ahearn, PhD

Principal Scientist, Information Systems Director

Eliza Spear, PWS

Senior Ecologist

George Iftner, LG

Principal Environmental Scientist, Sustainable Development Associate Practice Director

George Ritchotte, PWS

Associate Scientist

Gretchen Kayser, PE

Senior Engineer

Ian Mostrenko, PE

Associate Engineer

Jeff Parsons, PhD, PE

Principal Geomorphologist, Restoration Associate Practice Director

Jenn Schmidt, GISP

Spatial Science Director

Jennifer Swanson


Jess Brown

Senior Engineer

Jill Patterson

Strategic Client Services Director

John Lenth

Chief Strategy Officer

Josh LeClerc

Natural Resource Scientist

Lindsey Amtmann

Environmental Planner

Mark Ewbank, PE

Vice President, Restoration Practice Director

Matt Fontaine, PE

Principal Engineer

Meghan Feller, PE

Associate Engineer

Meghan Mullen

Design Engineer

Melissa Buttin

Strategic Client Services Director

Mike Spillane, PE

President and Chief Executive Officer

Pam Jackowich

Senior Publications Specialist

Phil Coughlan

Chief Operating Officer and Sustainable Development Practice Director

Rebecca Dugopolski, PE

Principal Engineer

Rob Zisette

Principal Aquatic Scientist

Shannon Wadkins

Administrative Coordinator

Theresa Wood

Vice President

Tracy Rudnick

Lead Project Accountant

Tyson Wright, PE

Principal Engineer and Sustainable Development Associate Practice Director

Thea Foulk


Nicole Trolio

Senior Graphic Designer

Satya Dhital, PE


Allison Nichols, PE


Rebecca Stebbing

GIS Analyst

David Cortese, PE

Senior Engineer

Shannon Gray, PE

Senior Engineer

Camryn Steiner


Andy Siegel

GIS Analyst

Sarah Nyman

Accounts Payable Administrator

Nicholas Harris

Environmental Data Scientist

Lacy Lackey


Craig Doberstein

Principal Engineer, California Regional Director

Nigel Baummer


Joy Michaud

Principal Scientist

Julianne Chechanover, PE


Shawree Zhang


Jillian Sullivan

People & Culture Director

Regina Lionheart


Erynne van Zee

Engineer/Landscape Designer

Jimmy Esteban, PE


Nikki VandePutte


Jack Brown


Shannon McKernan


Morgan St. Maxens

Talent Management Partner

Cory Zanker

Publications Specialist

Kathryn DeBenedetto

Senior Engineer

Jamie Elrod


Alex Erlenbach, PE

Senior Engineer

Stacie Chapman

Marketing Proposal Manager

James Packman, PMP

Associate Scientist

Vanessa Cuanan

IT Specialist

Stacy Vayanos

Landscape Architect

Scott Shumway

Environmental Technician