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Energy and Environment Directorate

Rob Mackley

Rob Mackley

(509) 372-6312


Rob has been with PNNL since 2004. His career has focused around the technical areas of groundwater and remediation monitoring, remedy development and implementation, and hydrogeologic characterization. He specializes in aquifer hydraulic testing, advanced groundwater and vadose zone monitoring instrumentation, and remedy performance monitoring and evaluation.

One of his favorite areas of research is the interaction of surface and groundwater. Rob has provided technical oversight of groundwater, surface water, and subsurface sediment sampling. He has overseen the drilling, design, and completion of groundwater wells. He also enjoys software programming and working with lab and field instrumentation. He is the proud father of four boys. He enjoys coaching them in sports and exposing them to the adventures of the outdoors.

Research Interests

  • Groundwater-surface water interaction
  • Hydrogeologic characterization
  • Aquifer and well testing
  • Groundwater remediation
  • Environmental monitoring
  • Sensors and field instrumentation

Education and Credentials

  • M.S., Geology, Utah State University, 2005
  • B.S., Geology, Utah State University, 2001

Awards and Recognitions

  • PNNL Outstanding Performance Award, 2005, 2006, 2007, 2012

PNNL Publications


  • Song X., H. Ren, Z. Hou, X. Lin, M. Karanovic, M.J. Tonkin, and V.L. Freedman, et al. 2023. "Predicting Future Well Performance for Environmental Remediation Design using Deep Learning." Journal of Hydrology 617, no. Part C:Art. No. 129110. PNNL-SA-178074. doi:10.1016/j.jhydrol.2023.129110




  • Hou Z., T.D. Scheibe, C.J. Murray, W.A. Perkins, E.V. Arntzen, H. Ren, and R.D. Mackley, et al. 2019. "Identification and mapping of riverbed sediment facies in the Columbia River through integration of field observations and numerical simulations." Hydrological Processes 33, no. 8:1245-1259. PNNL-SA-123667. doi:10.1002/hyp.13396
  • Johnson T.C., J.N. Thomle, J.L. Robinson, R.D. Mackley, and M.J. Truex. 2019. Stage B Uranium Sequestration Amendment Delivery Monitoring Using Time-Lapse Electrical Resistivity Tomography. PNNL-28619. Richland, WA: Pacific Northwest National Laboratory. Stage B Uranium Sequestration Amendment Delivery Monitoring Using Time-Lapse Electrical Resistivity Tomography
  • Johnson T.C., M.J. Truex, J.N. Thomle, R.D. Mackley, S.D. Springer, S. Mehta, and D.J. Becker, et al. 2019. "Integration of Real-Time Geophysical Monitoring with In Situ Uranium Remedy Implementation." In Proceedings of the 45th Annual Waste Management Conference (WM2019): Encouraging Young Men & Women to Achieve Their Goals in Radwaste Management, March 3-7 2019, Phoenix, AZ, Paper No. 19094. Tempe, Arizona:WM Symposia. PNNL-SA-139290.
  • Robinson J.L., R.D. Mackley, M.L. Rockhold, T.C. Johnson, and P. Jaysaval. 2019. Geophysical Methods for Stratigraphic Identification. PNNL-29182. Richland, WA: Pacific Northwest National Laboratory. Geophysical Methods for Stratigraphic Identification



  • Zhou T., M. Huang, J. Bao, Z. Hou, E.V. Arntzen, R.D. Mackley, and A.R. Crump, et al. 2017. "A New Approach to Quantify Shallow Water Hydrologic Exchanges in a Large Regulated River Reach." Water 9, no. 9:703. PNNL-SA-123562. doi:10.3390/w9090703


  • Fritz B.G., R.D. Mackley, and E.V. Arntzen. 2016. "Conducting Slug Tests in Mini-Piezometers." Groundwater 54, no. 2:291-295. PNNL-SA-105423. doi:10.1111/gwat.12335
  • Olsen K.B., R.R. Kirkham, V.T. Woods, D.A. Haas, J.C. Hayes, T.W. Bowyer, and D.P. Mendoza, et al. 2016. "Noble Gas Migration Experiment to Support the Detection of Underground Nuclear Explosions." Journal of Radioanalytical and Nuclear Chemistry 307, no. 3:2603-2610. PNNL-SA-109064. doi:10.1007/s10967-015-4639-7


  • Mackley R.D., D.M. Anderson, J.N. Thomle, and C.E. Strickland. 2015. Technical and Economic Assessment of Solar Photovoltaic for Groundwater Extraction on the Hanford Site. PNNL-24741. Richland, WA: Pacific Northwest National Laboratory. Technical and Economic Assessment of Solar Photovoltaic for Groundwater Extraction on the Hanford Site
  • Truex M.J., V.R. Vermeul, D. Adamson, M. Oostrom, L. Zhong, R.D. Mackley, and B.G. Fritz, et al. 2015. "Field Test of Enhanced Remedial Amendment Delivery Using a Shear-Thinning Fluid." Groundwater Monitoring and Remediation 35, no. 3:34-45. PNNL-SA-101736. doi:10.1111/gwmr.12101


  • Vermeul V.R., C.E. Strickland, P.D. Thorne, B.N. Bjornstad, R.D. Mackley, M.E. Kelley, and E.C. Sullivan, et al. 2014. "FutureGen 2.0 Monitoring Program: An Overview of the Monitoring Approach and Technologies Selected for Implementation." Energy Procedia 63. PNWD-SA-10395. doi:10.1016/j.egypro.2014.11.438


  • Carroll K.C., M.J. Truex, M.L. Brusseau, K.R. Parker, R.D. Mackley, and V.J. Rohay. 2013. "Characterization of Persistent Volatile Contaminant Sources in the Vadose Zone." Groundwater Monitoring and Remediation 33, no. 2:68-84. PNNL-SA-89088. doi:10.1111/gwmr.12006
  • Freedman V.L., R.D. Mackley, S.R. Waichler, and J.A. Horner. 2013. "Evaluation of Analytical and Numerical Techniques for Defining the Radius of Influence for an Open-Loop Ground Source Heat Pump System." Journal of Hydrologic Engineering 18, no. 9:1170-1179. PNNL-SA-84739. doi:10.1061/(ASCE)HE.1943-5584.0000720



  • Fritz B.G., and R.D. Mackley. 2011. "Author's Reply: Discussion on 'A wet/wet differential pressure sensor for measuring vertical hydraulic gradient'." Groundwater 49, no. 6:782. PNNL-SA-74887. doi:10.1111/j.1745-6584.2011.00801.x
  • Spane F.A., and R.D. Mackley. 2011. "Removal of River-Stage Fluctuations from Well Response Using Multiple-Regression." Groundwater 49, no. 6:794-807. PNNL-SA-74458. doi:10.1111/j.1745-6584.2010.00780.x
  • Truex M.J., T. Macbeth, V.R. Vermeul, B.G. Fritz, D.P. Mendoza, R.D. Mackley, and T.W. Wietsma, et al. 2011. "Demonstration of Combined Zero-Valent Iron and Electrical Resistance Heating for In Situ Trichloroethene Remediation." Environmental Science & Technology 45, no. 12:5346-5351. PNNL-SA-76701. doi:10.1021/es104266a
  • Truex M.J., V.R. Vermeul, D.P. Mendoza, B.G. Fritz, R.D. Mackley, M. Oostrom, and T.W. Wietsma, et al. 2011. "Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids." Groundwater Monitoring and Remediation 31, no. 1:50-58. PNNL-SA-70324.




  • Fritz B.G., and R.D. Mackley. 2008. "A wet/wet differential pressure sensor for measuring vertical hydraulic gradient." Ground Water 48, no. 1:117-121. PNNL-SA-63832.
  • Vermeul V.R., J.S. Fruchter, B.G. Fritz, R.D. Mackley, D.M. Wellman, and M.D. Williams. 2008. "In-Situ Uranium Stabilization Through Polyphosphate Injection: Pilot-Scale Treatability Test at the 300 Area, Hanford Site - 8187." In Waste Management 2008: HLW, TRU, LLW/ILW, Mixed, Hazardous Wastes & Environmental Management, 1-13. Tucson, Arizona:Arizona Board of Regent. PNNL-SA-58147.


  • Last G.V., C.J. Murray, D.A. Bush, E.C. Sullivan, M.L. Rockhold, R.D. Mackley, and B.N. Bjornstad. 2007. "Standardization of Borehole Data to Support Vadose Zone Flow and Transport Modeling." Vadose Zone Journal 6, no. 4:906-912. PNNL-SA-53079. doi:10.2136/vzj2006.0175

Energy and Environment

Core Research Areas