Retired - Advisor, Applied Decision Analytics
Retired - Advisor, Applied Decision Analytics


During his tenure at PNNL, Mr. Mark Triplett's experience and interests focused on the application of decision analysis, systems engineering, and data visualization methods to complex environmental problems. Since 1990, most of Mr. Triplett’s work supported cleanup activities at the Hanford Site. He served as a project manager and as an advisor to senior managers responsible for Hanford cleanup within the Department of Energy’s Richland Operations Office and Office of River Protection. His focus was on the development of automated tools for visualizing and analyzing industrial hygiene data, including waste tank vapor emissions, to support safe operations of Hanford’s tank farms. Mr. Triplett also led PNNL’s support to Japanese organizations involved with decommissioning of the Fukushima Daiichi Nuclear Power Station. Mr. Triplett consulted with Japanese industry and government leaders regarding the revitalization of the communities affected by the 2011 Fukushima reactor accidents. He now is retired from PNNL. 

Disciplines and Skills

  • Data-driven decision making
  • Decision analysis
  • Environmental risk assessment
  • Data visualization


  • MS, Engineering Science, Purdue University


Selected Publications



  • Triplett MB, TE Seiple, DJ Watson, BL Charboneau, and JG Morse. 2014. "Web-Based Geographic Information System Tool for Accessing Hanford Site Environmental Data." In WM2014: Annual Waste Management Symposium, March 2-6, 2014, Phoenix, Arizona, Paper No. 14447. Tucson, Arizona:Waste Management Symposia, Inc. PNNL-SA-99557.



  • Wellman DM, MB Triplett, MD Freshley, MJ Truex, RE Gephart, TC Johnson, and GB Chronister, et al. 2011. "Deep Vadose Zone Applied Field Research Center: Transformational Technology Development for Environmental Remediation." In Proceedings of the 37th Annual Radioactive Waste Management Symposium (WM 2011): Global Achievements and Challenges in Waste Management, February 27-March 3, 2011, Phoenix, Arizona, 6, 4969-4982, Paper No. 11074. Tucson, Arizona:WM Symposia. PNNL-SA-76702.
  • Wellman DM, MJ Truex, MD Freshley, RE Gephart, MB Triplett, and TC Johnson. 2011. Implementation Plan for the Deep Vadose Zone-Applied Field Research Center. PNNL-20209. Richland, WA: Pacific Northwest National Laboratory. Implementation Plan for the Deep Vadose Zone-Applied Field Research Center


  • Triplett MB, MD Freshley, MJ Truex, DM Wellman, KD Gerdes, BL Charboneau, and JG Morse, et al. 2010. "Integrated Strategy to Address Hanford's Deep Vadose Zone Remediation Challenges." In Proceedings of 13th International Conference on Environmental Remediation and Radioactive Waste Management. ICEM-2010, October 3-7, 2010, Tsukuba, Ibaraki Japan, Paper No. ICEM2010-40262. New York, New York:American Society of Mechanical Engineers. PNNL-SA-73041.


  • Morse JG, BL Charboneau, RW Lober, and MB Triplett. 2008. "Challenges for Deep Vadose Zone Remediation at the Hanford Site." In Waste Management 2008: HLW, TRU, LLW/ILW, Mixed, Hazardous Wastes & Environmental Management, Abstract# 8407. Tucson, Arizona:Arizona Board of Regents. PNNL-SA-58497.


  • Perez JM, DF Bickford, DE Day, D Kim, SL Lambert, SL Marra, and DK Peeler, et al. 2001. High-Level Waste Melter Study Report. PNNL-13582. Richland, WA: Pacific Northwest National Laboratory. High-Level Waste Melter Study Report