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

Phil Coughlan

Alice Lancaster, PE

Principal Engineer

Brenda Peterson

Human Resources Manager

Brian Scott

Senior River Restoration Engineer

Bruce Carpenter

Senior Hydrogeologist

Carol Slaughterbeck, PE, PMP

Executive Vice President

Charlie Maloof

Project Accountant

Christina Merten, PE, PWS

Principal Ecologist

Dylan Ahearn, PhD

Principal Scientist

Eliza Spear, PWS


George Iftner, LG

Principal Environmental Scientist

George Ritchotte, PWS

Senior Scientist

Gretchen Kayser

Project Engineer

Ian Mostrenko, PE

Associate Engineer

Jeff Parsons, PhD, PE

Principal Geomorphologist

Jenn Schmidt, GISP

Spatial Science Director

Jennifer Swanson


Jess Brown

Project Engineer

Jill Patterson

Marketing Director

John Lenth

Water Practice Director

Jordyn White

Marketing Specialist

Josh LeClerc

Natural Resource Scientist

Katie Wingrove, PE

Project Design Engineer

Lindsey Amtmann

Environmental Planner

Mark Ewbank, PE

Restoration Practice Director

Matt Fontaine, PE

Associate Engineer

Meghan Feller, PE

Associate Engineer

Meghan Mullen, PE

Design Engineer

Melissa Buttin

Marketing Director

Mike Spillane, PE

President and CEO

Pam Jackowich

Lead Word Processor

Phil Coughlan

Sustainable Development Practice Director

Rebecca Dugopolski, PE

Associate Engineer

Rob Zisette

Principal Aquatic Scientist

Shannon Wadkins

Administrative Assistant

Theresa Wood

Vice President

Tracy Rudnick

Project Accountant

Tyson Wright, PE

Principal Engineer

Thea Foulk


Nicole Trolio

Graphic Designer

Randall Taylor, PLA

Landscape Architect

Satya Dhital, PE


Allison Nichols


Rebecca Stebbing


David Cortese, PE

Project Engineer

Shannon Gray, PE

Senior Engineer

Camryn Steiner


Andy Siegel

GIS Analyst

Sarah Nyman

Accounting Administrator

Nicholas Harris

Environmental Data Scientist

Lacy Lackey


Craig Doberstein


Nigel Baummer


Joy Michaud

Principal Scientist

Julianne Chechanover


Katie Jerauld

Environmental Planner

Shawree Zhang


Jillian Sullivan

Human Resources Director