Expert Services
Geo-Logic Associates provides technical expertise to attorneys and mediators in support of legal disputes involving environmental, water resources, water rights, and real estate issues.
Credible Science. Defensible Opinions.
Expert testimony and deposition grounded in sound science, technical integrity, and real-world experience help clients navigate litigation, mediation, and dispute resolution with confidence.
Our staff includes specialists in hydrology, hydrogeology, geochemistry, and contaminant fate and transport, and has presented expert testimony and deposition. We support legal teams by offering technical expertise in:
- Providing technical assistance during litigation, mediation, settlement negotiations, or alternative dispute resolution (ADR)
- Developing expert opinion reports and declarations
- Providing expert testimony and depositions
- Developing and managing environmental databases, courtroom exhibits, and visualizations
- Providing confidential consulting during all phases of dispute resolution
Market Leader
Testifying Experts
Water resources and rights
Water supply well design and construction
Historical land use and property boundary issues
Groundwater modeling
Contaminant hydrogeology
Vadose zone hydrology
Site investigation and remediation
PFAS
Carbon capture and storage
Geotechnical engineering
Solid waste
Geochemistry
Water resources and rights
- R. Douglas Bartlett, RG – Scottsdale, AZ
- Neil Blandford, PG – Albuquerque, NM
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Bill Loughlin, PG – Park City, CA
- Rick Mitchell, PG, CEG - Petaluma, CA
- Tony Morgan, PG, CHG – Ontario, CA
- Roger Peery, CPG, PG – Albuquerque, NM
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- John Shomaker, PhD, PG – Albuquerque, NM
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
- Christopher Wolf, PG – Albuquerque, NM
Water supply well design and construction
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Marvin Glotfelty, RG – Scottsdale, AZ
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Bill Loughlin, PG – Park City, UT
- Tony Morgan, PG, CHG – Ontario, CA
- Roger Peery, CPG, PG – Albuquerque, NM
- John Shomaker, PhD, PG – Albuquerque, NM
- Christopher Wolf, PG – Albuquerque, NM
Historical land use and property boundary issues
Kenneth Calhoun, GISP – Albuquerque, NM
Groundwater modeling
- R. Douglas Bartlett, RG – Scottsdale, AZ
- Neil Blandford, PG – Albuquerque, NM
- Farag Botros, PhD, PE – Ontario, CA
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Rick Mitchell, PG, CEG - Petaluma, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
Contaminant hydrogeology
- R. Douglas Bartlett, RG – Scottsdale, AZ
- Neil Blandford, PG – Albuquerque, NM
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Douglas Mauntel, PE – Springfield, IL
- Rick Mitchell, PG, CEG - Petaluma, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
Vadose zone hydrology
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
Site investigation and remediation
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Neven Matasovic, PhD, PE, GE – Costa Mesa, CA
- Roger Peery, CPG, PG Albuquerque, NM
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
PFAS
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Rick Mitchell, PG, CEG - Petaluma, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
Carbon capture and storage
Gregory Schnaar, PhD, PG – Silver Spring, MD
Geotechnical engineering
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Neven Matasovic, PhD, PE, GE – Costa Mesa, CA
- William (Bill) McCormick, PG, CEG – Santa Rosa, CA
Solid waste
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Bradley Hunsberger, LPG – Springfield, IL
- Steven Gobleman, PE, LPG – Springfield, IL
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Neven Matasovic, PhD, PE, GE – Costa Mesa, CA
- Doug Mauntel, PE – Springfield, IL
- William (Bill) McCormick, PG, CEG – Santa Rosa, CA
- Devin Moose, PE, DEE – Chicago, IL Area
- Neil C. Nowak, PE – Denver, CO Area
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
Geochemistry
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Christopher Wolf, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
Water resources and rights
- R. Douglas Bartlett, RG – Scottsdale, AZ
- Neil Blandford, PG – Albuquerque, NM
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Bill Loughlin, PG – Park City, CA
- Rick Mitchell, PG, CEG - Petaluma, CA
- Tony Morgan, PG, CHG – Ontario, CA
- Roger Peery, CPG, PG – Albuquerque, NM
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- John Shomaker, PhD, PG – Albuquerque, NM
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
- Christopher Wolf, PG – Albuquerque, NM
Water supply well design and construction
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Marvin Glotfelty, RG – Scottsdale, AZ
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Bill Loughlin, PG – Park City, UT
- Tony Morgan, PG, CHG – Ontario, CA
- Roger Peery, CPG, PG – Albuquerque, NM
- John Shomaker, PhD, PG – Albuquerque, NM
- Christopher Wolf, PG – Albuquerque, NM
Historical land use and property boundary issues
Kenneth Calhoun, GISP – Albuquerque, NM
Groundwater modeling
- R. Douglas Bartlett, RG – Scottsdale, AZ
- Neil Blandford, PG – Albuquerque, NM
- Farag Botros, PhD, PE – Ontario, CA
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Rick Mitchell, PG, CEG - Petaluma, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
Contaminant hydrogeology
- R. Douglas Bartlett, RG – Scottsdale, AZ
- Neil Blandford, PG – Albuquerque, NM
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Douglas Mauntel, PE – Springfield, IL
- Rick Mitchell, PG, CEG - Petaluma, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
Vadose zone hydrology
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
- Todd Umstot – Albuquerque, NM
Site investigation and remediation
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Steven T. Finch, Jr., CPG – Albuquerque, NM
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Neven Matasovic, PhD, PE, GE – Costa Mesa, CA
- Roger Peery, CPG, PG Albuquerque, NM
- Gregory Schnaar, PhD, PG – Silver Spring, MD
- Daniel B. Stephens, PhD, PHG, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
PFAS
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Rick Mitchell, PG, CEG - Petaluma, CA
- Gregory Schnaar, PhD, PG – Silver Spring, MD
Carbon capture and storage
Gregory Schnaar, PhD, PG – Silver Spring, MD
Geotechnical engineering
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Neven Matasovic, PhD, PE, GE – Costa Mesa, CA
- William (Bill) McCormick, PG, CEG – Santa Rosa, CA
Solid waste
- Daniel J. Drommerhausen, PG – Chicago, IL Area
- Bradley Hunsberger, LPG – Springfield, IL
- Steven Gobleman, PE, LPG – Springfield, IL
- Gary Lass, PG, CEG, CHG – Ontario, CA
- Neven Matasovic, PhD, PE, GE – Costa Mesa, CA
- Doug Mauntel, PE – Springfield, IL
- William (Bill) McCormick, PG, CEG – Santa Rosa, CA
- Devin Moose, PE, DEE – Chicago, IL Area
- Neil C. Nowak, PE – Denver, CO Area
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
Geochemistry
- John J. Dodge, PG, CHG – Costa Mesa, CA
- Christopher Wolf, PG – Albuquerque, NM
- Nicole T. Sweetland, PhD, PG – Albuquerque, NM
