GLA is proud to welcome the team from John Shomaker & Associates, Inc. (JSAI) into our team of nearly 400 professionals. The addition of this respected hydrogeologic consulting firm strengthens GLA’s presence in the Southwest and further enhances our industry-leading capabilities in hydrology and water resources. JSAI’s Albuquerque, New Mexico office is GLA’s 30th office location.
We’re honored that the firm’s distinguished leadership team of John W. Shomaker, PhD, President and Senior Principal Hydrogeologist; Roger Peery, CEO and Principal Hydrogeologist; and Steven T. Finch, Jr., Vice President and Principal Hydrogeologist/Geochemist, will continue in their current roles. This continuity will promote the same high level of client service and technical excellence that JSAI has been known for since 1975.
JSAI offers technical expertise in:
- Groundwater development: Well site selection and well design; well site hydrogeologic services; pumping test planning, execution and interpretation; well evaluation and rehabilitation
- Water resource and water rights assessment: Groundwater modeling, water balance and water management, groundwater recharge, water development planning, water right acquisition support
- Geochemistry: Geochemical and contaminant-transport modeling, characterization of groundwater contamination, drinking water quality evaluation, source water analysis
- Mining hydrology: Pit dewatering modeling, mine water balance and management, geochemical assessment of mine tailing and waste rock drainage, groundwater capture systems, environmental effects evaluation
- Geologic services: Geologic mapping and terrain analysis, hydrogeologic conceptual models, well log analysis, fracture analysis
- Environmental services: Groundwater monitoring and sampling, technical assistance with discharge permit applications and compliance, leaking underground storage tank investigation and remediation, wellhead protection compliance studies and plans.
- Education: a variety of short courses on groundwater wells and other hydrogeology topics
- Expert Witness: Dr. Shomaker, Steve Finch, Roger Peery, Dr. Melis, and Annie McCoy have provided expert testimony on matters related to water rights and water resource development.
Together, we look forward to delivering even greater value, innovation, and technical excellence to our clients and communities.







