Dan Nunez

Vice President – West Region

Education: BS Chemisty, MS Environmental Science

Experience: >20 years 

Fun Fact: Kayaking, mountain biking, traveling, and photography

Connect with Dan on LinkedIn

Ryan Miller

Director of Land Science

Education: BS in Environmental Studies, MA in Business Administration
Experience: 17 years
Fun Fact: Avid golfer 

Connect with Ryan on LinkedIn

Maureen Dooley

Vice President Industrial Sector

Education: BS Biology, MS Biology
Experience: 30+ years
Fun Fact: Horseback rider and golfer 

Connect with Maureen on LinkedIn

Todd Herrington

Director of Product Management

Education: BS Civil Engineering, MS Environmental Engineering
Experience: 24 years
Fun Fact: I dabble in high end audio and always appreciate a good sounding system. Enjoy staying fit and look foward to traveling again. 

Connect with Todd on LinkedIn

Brett Hicks

Central Region Manager

Education: BSc Biology
Experience: 12 years
Fun Fact: I enjoy being outdoors

Connect with Brett on LinkedIn

Ryan Moore

PFAS Program Director

Education: BS Environmental Studies, Manchester University 
Experience: 20+ years
Fun Fact: I really enjoy skiing with the family and most weekends in the winter we are on the slopes. I also like doing yardwork and projects around the house.

Connect with Ryan on LinkedIn

John Freim

Director Materials Science and ZVI Technology

Education: BS chemical engineering, MS Materials Science, PhD Materials Science  
Experience: 20 years
Fun Fact: I’ve traveled to six continents at least two times each

Connect with John on LinkedIn

Keith M. Gaskill

LPG, Sr Design Specialist/Technical Services Group Coordinator

Education: MSc in Geochemistry and Hydrogeology 
Experience: 21+ years
Fun Fact: My wife and I love to travel, camp, and do anything outdoors. We have three rescue pups.

Connect with Keith on LinkedIn

Jeremy Birnstingl

VP Environmental Technology

Education: Ph.D Environmental Chemistry and Applied Microbiology; B.Sc. (honours) Environmental Biology; Chartered Environmentalist (C.Env.); Fellow of the Royal Society of Chemistry (FRSC)
Experience: 32 years
Fun Fact: I love the stage! Professionally it’s public speaking. In amateur time it’s music. (Guitar and voice)

Connect with Jeremy on LinkedIn

Tyler Harris

PetroFix Design Specialist

Education: BSc Biology, MSc Applied Environmental Microbiology
Experience: 5 years
Fun Fact: I compete in strongman competitions throughout the southeast.

Connect with Tyler on LinkedIn

Ian Doliana

Design Specialist

Education: BSc Environmental Engineering
Experience: 5 years
Fun Fact: I enjoy DIY projects and have a pet fish

Connect with Ian on LinkedIn

Aaron Treston

Staff Geologist

Education: BS in Geology
Experience: 2 years
Fun Fact: I enjoy playing Tabletop Role-playing games with my friends, both online and in person.  

Connect with Aaron on LinkedIn

Nick Mjolsness

West Region Manager

Education:  BA Public Relations and Advertising
Experience:  7 years
Fun Fact: Reading and hiking. My favorite place for hiking is Kauai and theBob Marshall Wilderness in Montana.

Connect with Nick on LinkedIn

Andrew Kavanagh

Central Region Project Manager

Education: BA Geology, Colgate University, Licensed Professional Geologist (LPG)  
Experience: 9 years
Fun Fact: I play guitar in a rock band called Praise the Fallen. I have two cats, Joan Jett and Piper.

Connect with Andrew on LinkedIn

Kristen Thoreson

VP of Quality and Process Improvement

Education: Ph.D. in Chemistry
Experience: 10+ years
Fun Fact: I have two rescued, dog-like cats named Millie and Fermi

Connect with Kristen on LinkedIn

Paul Erickson

Vice President of Research & Development

Education:  PhD in Environmental Chemistry, MSc in Chemistry, BSc in Chemistry
Experience:  12 years
Fun Fact: I like to do anything outside! I’m trying to pass on my love for the outdoors and specifically rock climbing to my three kids.

Connect with Paul on LinkedIn

Barry Poling

Senior Vice President – North America

Education: BSc in Environmental Management  
Experience: 20 years
Fun Fact: Outside of work, I like to coach my daughters’ softball teams. 

Connect with Barry on LinkedIn

Andrew Kiggen

Southeast District Technical Manager

Education: BS Geology
Experience: 6 years
Fun Fact: My dog, Banks, hiking, camping, golf, photography, and sushi lover

Connect with Andrew on LinkedIn