The Nielsen Environmental Field School

The Nielsen Environmental Field School

Established in 1990 by company principals David M. Nielsen (a geologist and hydrogeologist) and Gillian L. Nielsen (a hydrologist and aquatic biologist), The Nielsen Environmental Field School quickly became the leading provider of practical, hands-on environmental field training in the world. Times have changed, and so have we! In 2015, in celebration of our 25th anniversary of offering the most highly acclaimed environmental training anywhere, we have converted all of our `live` field courses to a web-based, distance-learning format, in the form of The Nielsen Environmental E-School. As of September, 2015, the E-School replaces our `live` open-enrollment field courses.

Company details

9600 Achenbach Canyon Road , Las Cruces , NM 88011 USA
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Business Type:
Training provider
Industry Type:
Soil and Groundwater Science and Research
Market Focus:
Internationally (various countries)
Year Founded:

All of our former open-enrollment field courses are now available exclusively on-line so that anyone, anywhere can take any of our E-Courses or modules, as long as they have a computer or tablet and Internet access.  We will continue to offer on-site courses in a classroom-only format for groups that have 15 or more people to train.  For these courses, we can add field sessions in cases where the client provides the field sites and the field equipment.

The Nielsen Environmental E-School is the on-line equivalent of the Nielsen Environmental Field School, and offers the same high-quality, practically oriented training options in a web-based, distance-learning format.  The goal of the E-School is to provide environmental professionals with the highest quality environmental training to help them advance their careers.  The mission of the E-School is to provide affordable and highly accessible environmental training with the same state-of-the-art technical content as our Field School courses to those environmental professionals who have limited budgets and time for travel and who desire a more convenient option for their training.  Many E-School E-Modules contain detailed field videos of technologies and methodologies discussed in the lecture portions of the E-Modules to provide detailed instruction on how field equipment and methodologies should be used properly. 

Phase 1 of the E-School was released in January, 2015 and Phase 2 was released in September 2015.  Now available are 78 professionally prepared 40- to 90-minute E-Modules derived from our popular Environmental Sampling Field Course, Complete Ground-Water Monitoring Field Course and Complete Soil Sampling Field Course.  You will now be able to take any of 7 E-Courses, including:

  • The Environmental Sampling E-Course (32 modules)
  • The Complete Ground-Water Monitoring E-Course (29 modules)
  • The Ground-Water Monitoring Well Design, Construction & Development E-Course (14 modules)
  • The Complete Ground-Water Sampling E-Course (15 modules)
  • The Low-Flow and No-Purge Sampling E-Course (13 modules)
  • The Complete Soil Sampling E-Course (17 modules)
  • The Soil Sampling for Volatile Organic Compounds E-Course (14 modules)

Convenient, Affordable Web-Based Training - The Nielsen Environmental E-School
We have completed the process of converting all of our 'live' field courses to 'E-Courses' - a web-based, distance-learning format that has the same technical content as our field courses.  You can now take any of 78 individual 40- to 90-minute E-Modules or any one of 7 E-Courses that are the equivalent of our 'live' training courses. 

International Certification Program for Environmental Samplers & Specialists
Receive the recognition you deserve for your field experience and expertise by earning one or more of five professional credentials offered by this program.  Become Certified as an Environmental Sampler, Ground-Water Sampler, Soil Sampler, Ground-Water Monitoring Specialist or a Monitoring Well Installation Specialist.

On-Site Training - The Nielsen Environmental Field School
A very cost-effective alternative for groups that have 15 or more staff to train.  We travel all over the world to teach environmental field courses for clients who call us in to their office to train their staff. Contact us today via e-mail for a free no-obligation quote.


David M. Nielsen is President of Nielsen Ground-Water Science, Inc., the parent company of The Nielsen Environmental E-School and The Nielsen Environmental Field School.  He is a Certified Professional Geologist (AIPG #5040), a Professional Hydrogeologist (AIH #991), a Certified Ground-Water Professional (AGWSE #179) and a Certified/Licensed/Registered Professional Geologist in 7 states (AK, AR, DE, FL, IN, SC, TX). He has 38 years of experience in ground-water and environmental consulting, training and research. He has managed ground-water contamination investigations, environmental site assessments, ground-water monitoring and sampling programs, petroleum hydrocarbon spill investigations and remedial projects across the U.S.  David was one of the primary instructors for Princeton Groundwater's Groundwater Pollution and Hydrology Course for 12 years, and he has also developed curriculum for and instructed: undergraduate, graduate and continuing education courses in ground-water science at Wright State University; a one-year Hydrogeologic Training Program for the Environmental Response Division of the Michigan Department of Environmental Quality; Technology Transfer workshops on Environmental Site Characterization and Ground-Water Monitoring and Sampling for the U.S. EPA; and Waste Management, Inc.'s Landfill University. He has instructed more than 400 ground water and environmental science short courses and workshops for consulting firms, regulatory agencies, industrial concerns, the Department of Defense, the U.S. EPA, trade and professional organizations, educational institutes and universities in the U.S., England, Canada, Australia, Guatemala and Mexico. 

David is former Chairman of ASTM Subcommittee D-18.21 on Ground-Water and Vadose Zone Investigations, a consultant to the U.S. EPA Science Advisory Board, a member of the U.S. Department of Defense SERDP/ESTCP Peer Review Panel, and an advisor to the U.S. Department of Energy National Advanced Drilling and Excavation Technology Program. He is the editor and a contributing author for The Practical Handbook of Environmental Site Characterization and Ground-Water Monitoring (First and Second Editions; 1991 and 2006), The Essential Handbook of Ground-Water Sampling (2007) and Technical Guidance on Low-Flow Purging and Sampling and Minimum-Purge Sampling (2002). He is also an active member of AIPG, the Association of Ground Water Scientists and Engineers, the American Institute of Hydrology and the Association of Engineering Geologists. He served for 12 years on the Wright State University Geology Department's Board of Counselors and served for 12 years as Editor of Ground-Water Monitoring and Remediation. He holds B.A. and M.S. degrees in geology from Miami University (1974) and Bowling Green State University (1977) respectively. Prior to co-founding the Nielsen Environmental Field School and Nielsen Ground-Water Science, Inc., he managed regional offices for two geoscientific and engineering consulting firms, served as director of research and education for the National Ground Water Association and worked for state environmental agencies in Massachusetts, West Virginia and Ohio.

David has also written guidance documents on direct-push technology and ground-water sampling for the U.S. EPA Superfund program, and reviewed dozens of technical reports for the U.S. EPA's Environmental Technology Verification (ETV) program. He is the recipient of the Outstanding Service Award of the Association of Ground Water Scientists and Engineers, The Outstanding Achievement Award of ASTM, and a 4-time recipient of ASTM's Special Service Award.


Gillian Nielsen is Vice President of Nielsen Ground-Water Science, Inc. the parent company of The Nielsen Environmental E-School and The Nielsen Environmental Field School.
She is also Chairman of the International Certification Program for Environmental Samplers and Specialists.  She has 35 years of International experience as an environmental and ground-water consultant and trainer.  During her professional career she has developed, managed and implemented ground-water monitoring and sampling programs, soil gas monitoring investigations, multimedia environmental sampling programs, RCRA compliance audits, environmental site assessments and remediation programs at hazardous and non-hazardous waste sites in the U.S. and Canada. She has also played a key role in the development and management of corporate standard operating procedures as well as health and safety procedures and policies. 

Gillian specializes in developing and instructing a wide variety of field practice-oriented training programs for private industry, consulting firms, state and Federal regulatory agencies, universities, professional and trade associations. She has lectured extensively and taught hundreds of field courses on the topics of ground-water monitoring and sampling, environmental sampling and field sample analysis, design and implementation of soil gas investigations and RCRA compliance throughout the U.S. as well as Canada, England, Guatemala, Mexico and Australia. Gillian also conducts 8-hour health and safety refresher training courses for clients across the U.S. who are involved in environmental contamination investigation and remediation projects. In addition to training, she works closely with industry and consulting firms as a consultant conducting audits of field investigation activities, negotiating with PRPs and regulatory agencies, developing corporate standard operating procedures and health and safety plans and providing technical reviews of site investigation reports. She also works closely with environmental instrumentation companies in the evaluation of new equipment and in development of new instrumentation. 

Gillian is a 16-year member of the Editorial Board of Ground-Water Monitoring and Remediation and a member of the ASTM Subcommittee D-18.21 task group on ground-water sampling. She is the recipient of Ground Water Publishing Company's Outstanding Service Award for her work on the editorial board of the journal Ground-Water Monitoring and Remediation and has received several Standards Development Awards from ASTM. She has authored a number of scientific papers and written many ASTM Standards dealing with ground-water sampling, soil-gas monitoring, field analysis of environmental samples, and field decontamination procedures, and was a contributing author for first (1991) and second (2006) editions of The Practical Handbook of Environmental Site Characterization and Ground-Water Monitoring as well asTechnical Guidance on Low-Flow Purging and Sampling and Minimum- Purge Sampling (2002). She is also a co-editor and contributing author of the text The Essential Handbook of Ground-Water Sampling, published in January 2007. Gillian frequently provides technical reviews of state and Federal regulatory agency technical guidance documents. Gillian holds B.Sc. degrees in geography (hydrology) and biology (aquatic) from Trent University in Peterborough, Ontario Canada.