Mr. Palumbo has over forty years of hydrological experience. He has been involved in numerous ground water and surface water projects. His areas of expertise are hydrogeology, ground water hydrology, water resources, computer modeling, and well hydraulics. Within Colorado, he has constructed aquifer models, supervised the installation of municipal water wells, and conducted hydrogeologic and surface water projects. He is an expert on the technical aspects of Colorado water law. He has been involved in numerous ground water applications, surface water transfers, plans for augmentation, and water resource valuations.
David S. Lipson, Ph.D., P.G., is a Principal Hydrogeologist specializing in groundwater and surface-water hydrology, groundwater-surface water interactions, water quality, fate and transport of contaminants including PFAS, groundwater remediation, geochemistry, and aquifer storage and recovery (ASR). Dr. Lipson brings more than 29 years of experience working in Colorado, throughout the U.S., and internationally, solving complicated water and environmental problems. He is an Adjunct Professor at Colorado School of Mines where he teaches Advanced Topics in Hydrogeology, and has served as a Visiting Professor at the Chinese Academy of Sciences in Nanjing. He is an editor of the widely-read scientific journal Groundwater, and serves on the Board of Directors of the Scientists and Engineers Section of the National Ground Water Association (NGWA).
Matt specializes in groundwater supply, Colorado water rights, and project management. After graduating with a Geology degree from Colorado College, he began his career in the fascinating field of groundwater at HRS Water Consultants in 1998. He has completed numerous groundwater projects throughout Colorado. His clients include municipalities, water districts, private well owners, farmers and ranchers, ditch companies, State and Federal agencies, HOA’s, and private natural resources companies.
Mr. Barrett has over twenty years of experience in the water resources field. Prior to working at HRS, he worked for the Colorado Division of Water Resources; Assistant Water Commissioner on the Animas River, Division 7 Durango Office; Engineering Technician for the Ground Water Supply Department, Denver Office; and Hydrographer, Division 1 Greeley Office. Through his work with the Colorado Division of Water Resources, Mr. Barrett developed a strong understanding of the priority system and how water rights are administered and accounted for in the State of Colorado. Since beginning work at HRS in 2008, Mr. Barrett has assisted clients with a variety of projects ranging from change of use cases and augmentation plan development to client water rights protection, water rights accounting, GIS/DB project development, water rights valuations, and water resources planning.
Ms. Beetle-Moorcroft has experience as a hydrogeologist and geophysicist in both the public and private sectors. She has field experience drilling and developing Denver Basin bedrock wells and alluvial wells, conducting pump tests, water quality sampling, and running geophysical surveys (both near surface and borehole). Most recently, she has worked to develop an early warning detection system for PFAS through the creation of a sampling plan and comprehensive data analysis. She has also worked extensively in the San Luis Valley for her master’s thesis, where she studied groundwater and surface water interactions along the Alamosa River using a combination of near surface geophysics (resistivity & seismic refraction) and numerical modeling (MODFLOW-SFR).
Ms. Beetle-Moorcroft has further experience with geologic, hydrologic, and geophysical data interpretation and statistical analysis, geologic cross-section construction, GIS map construction, and numerical modeling.
Katharina Lowe joined HRS in 2021 to support the team in all water-related issues. Her background is in hydrogeology, and she is currently working on her PhD at the Technical University of Munich, Germany. Her experience includes groundwater flow and heat transport modeling with MODFLOW and FEFLOW, well drilling, soil and water sampling, and laboratory analysis. She also has increasing involvement in water rights issues.
Katharina is motivated by food. One of her weaknesses is chocolate.
Sophia joined HRS as a full-time employee in November 2020 after completing summer internships in 2018 and 2019. She graduated from the University of Portland in 2019 with a Bachelor of Science in Environmental Science and earned a Master’s degree in Hydrology from the New Mexico Institute of Mining and Technology in 2025. At HRS, Sophia contributes to water supply, environmental groundwater, and surface water projects. Her work includes data collection, review, and analysis; GIS mapping and spatial analysis; well and water quality assessments; and report preparation. Outside of work, Sophia is an avid downhill skier, gardener, and creative cook.
Kevin Murphy started as an intern for HRS in the summer of 2021 during which he assisted in ground and surface water, water quality, water rights, and water law projects. He graduated from the University of Colorado, Boulder in August of 2022 with a bachelor’s degree in environmental engineering and a minor in geologic sciences, after which he was hired full-time as a Staff Hydrogeologist/Technician at HRS in 2023. He provides general project support through data collection and management, field work, GIS/mapping, and report preparation for water supply and quality projects. As a current EIT and full-time employee at HRS, Kevin looks forward to developing his career and skills through a wide variety of water and environmental projects. In his free time, he enjoys adventuring in and around Colorado by fly fishing, hiking, rock-hounding, and camping.
Madeline Duhnoski joined HRS as a Hydrogeology Technician in 2024. She graduated from Dartmouth College with a degree in Earth Sciences and Geography in 2023, where she was able to partake in field work projects across the American West, and write a surface water-focused thesis. At HRS, Madeline provides project support through her GIS/mapping knowledge, data analysis, and time in the field. She is thoroughly enjoying learning about new field equipment and the drilling industry. As a newcomer to Colorado, Madeline has been spending time outside of work discovering fun climbing spots, used bookstores, and farmer’s markets.
Margo joined HRS as a Hydrogeology Technician in 2025, becoming a full-time employee after completing a summer internship with the company. She earned her B.A. in Environmental Science from Colorado College in 2024, with minors in Resource Systems of the American West and Urban Studies. Margo has explored water resources from multiple perspectives, including Front Range water conservation, sustainability policy initiatives, hydrochemistry research, and GIS analysis, and she looks forward to continuing to build a holistic career in natural resources. At HRS, she supports projects through field work, GIS mapping, data analysis, and technical assistance for groundwater studies.
Abbey joined HRS in 2025 as a hydrogeologist. She graduated from University of Dayton with a dual major in geology and sustainability with a focus on sustainable watersheds. Prior to joining, Abbey gained diverse experience in Colorado based hydrogeology and environmental consulting, including aquifer testing, lithologic logging, monitoring well drilling and installation, regulatory compliance and water quality sampling under Colorado regulation 11, UIC, PFAS, and GWUDI programs. She has supported projects from start to finish through fieldwork, data collection and analysis, GIS mapping, and technical report preparation.
Abbey values the problem-solving nature of hydrogeology and opportunities to learn both the field and office environments. She especially enjoys projects where she can connect regulatory frameworks with practical groundwater and surface water applications. Outside of work, Abbey loves cooking meals (with lots of leftovers), exploring vintage and thrift stores (and especially estate sales), practicing Pilates, and spending time with her cat, Keith, who makes his feelings known the second Abbey gets home each day.
Tammi is HRS’ office manager.
