Associate Professor of Forest Operations
Forestry and Environmental Conservation Department
Office: 230 Lehotsky Hall
Ph.D. Forest Resources
University of Maine 2015
M.S. Forest Resources
University of Maine 2013
B.S. Forest Management
University of Applied Forest Sciences Rottenburg 2010
FOR 2520 - Forest Operations (Summer Camp)
FOR 2540 - Forest Products (Summer Camp)
FOR 3410 - Wood Procurement
FOR 4100/6100 - Harvesting Processes
FOR 4190/7070 - Forestry and Recreation in Southern Germany (Study Abroad)
FNR 4700 - Multiple Creative Inquiry Courses
FOR 8930 - Statistical Methods in Natural Resources
FOR 8930 - Readings in Forestry
Dr. Patrick Hiesl is forestry professional by heart. He has earned his scientific degrees in Germany and the USA, and has deepened his skills in forest inventory and private woodlot management in Alberta, Canada. Following his graduate studies he has worked in academia as an assistant and associate professor of Forest Operations at Paul Smith's College in New York and Clemson University in South Carolina. He has several years of experience working with logging contractors to conduct time and motion studies on selected harvesting equipment, assess best management practices implementation, and evaluate overall harvesting costs. In addition to research, he has taught several courses in forest operations and wood procurement, but also conducted extension training programs surrounding the use of chainsaws and portable sawmills. Dr. Hiesl has published over 30 articles in various journals and presented his research results at conferences and logging contractor workshops across the USA and Canada. He currently is a South Carolina Registered Forester, SAF Certified Forester, drone pilot, and an active member of the Council on Forest Engineering and the Society of American Foresters.
Dr. Hiesl's research interests are in forest operations and forest engineering with a focus on better understanding the cost and productivity of harvesting operations on small and large forest areas, as well as the use of modern technology to help with forest management activities. He currently conducts research involving horse logging and small-scale equipment, the use of consumer-based LiDAR technology in forestry, logging business surveys to better understand the needs and challenges of logging businesses, mental workload evaluations of logging operations, and the costs and productivity of implementing Climate Smart Forestry practices. Dr. Hiesl collaborates with several faculty within Clemson University and the Department of Forestry and Environmental Conservations as well as the University of Georgia.
Current Lab Members:
Dean Satterlee, MFR, 2023-Present
Bart Swecker, MS Forest Resources, 2022-Present
Hasini Mapatunage, MS Forest Resources, 2022-Present
Shubhechchha Khadka, MS Forest Resources, 2022-Present
Ian Snider, MS Forest Resources, 2020-Present
Graduated Lab Members:
Manisha Parajuli, MS Forest Resources, 2020-2021
Ellie Johnson, MS Forest Resources, 2019-2021 (Co-Chair)
Keith Phelps, MS Forest Resources, 2019-2021 (Co-Chair)
Kipling Klimas, MS Forest Resources, 2018-2020
Graduate Committee Member:
Armin Weise, MS Forest Resources, 2021-Present
Trent Miller, MS Forest Resources, 2020-Present
Jacob Murray, MS Forest Resources, 2019-2022
Andrew Purcell, MS Forest Resources, 2019-2020
Chip Byrd, MFR, 2020-2021
Daniel Callaghan, MS Forest Resources, 2017-2019
Thomas Joseph, MFR, 2017-2018
Stephen Harris, MS Wildlife and Fisheries Biology, 2016-2018
Trey Trickett, MS Forest Resources, 2016-2018
Brandon Stoots, MFR, 2015-2016
Slayton Hazard-Daniel, MFR 2015-2016
Extension and Outreach
Dr. Hiesl is passionate about Extension and educating private forest owners to better manage their forest land. He has been involved in several Extension training programs speaking about forest operations and wood procurement. He most recently started a chainsaw safety training program for female forest owners as part of the Women Owning Woodlands program in South Carolina that has expanded to also include a mixed-gender training program. Dr. Hiesl is a presenter within the Master Tree Farmer program and currently is working on an online training program for beginning forest owners. He also operates a portable sawmill in collaboration with the Clemson Experimental Forest and is in the process of establishing a training program. He frequently collaborates with Extension agents and specialists within the Forest and Natural Resources Program team.
Murray, J., P. Hiesl, D. Hagan, and R. Baldwin. 2022. Assessing productivity and cost of timber harvesting during longleaf pine ecosystem restoration. International Journal of Forest Engineering, December 2022: pp 13.
Murray, J., D. Hagan, P. Hiesl, and R. Baldwin. 2022. The influence of slash management practices on water and nutrient dynamics in Longleaf pine forests. Forests, 13(9): pp 18.
Hiesl P. and J. Steele. 2022. How to stay safe around chainsaws. Land-Grant Press by Clemson Extension. LGP 1141. Clemson, SC, USA: Clemson Cooperative Extension. pp 11. https://lgpress.clemson.edu/publication/how-to-stay-safe-around-chainsaws/.
Parajuli, M., P. Hiesl, D. Hagan, P. Khanal. 2022. Logging operations and soil conditions. Land-Grant Press by Clemson Extension. LGP 1135. Clemson, SC, USA: Clemson Cooperative Extension. pp 12. https://lgpress.clemson.edu/publication/logging-operations-and-soil-compaction/.
Parajuli, M., P. Hiesl, M. Smidt, and D. Mitchell. 2021. An Evaluation of Woody Biomass and Pulpwood Market Competition within a Range of Procurement Distances. Forest Products Journal, 71(4): 407-418.
Phelps, K., P. Hiesl, D. Hagan, and T. Hoteling-Hagan. 2021. The Harvest Operability Index (HOI): A Decision Support Tool for Mechanized Timber Harvesting in Mountainous Terrain. Forests, 12(10): pp17.
Hiesl, P. and A. Turner. 2020. Give Trees, Save Taxes. Forest Landowner, 79(2): 24-28.
Hiesl, P. and R.A. Hardee. 2020. Understanding the other party! Commentary in Journal of Forestry, 118(6): 644-646.
Klimas, K., P. Hiesl, D. Hagan, and D. Park. 2020. Burn severity effect on sediment and nutrient exports from southeastern forests using simulated rainfall. Forest Science, 66(6): 678-686.
Hiesl, P. 2020. Sealed timber bids: What you need to know to sell your timber. Land-Grant Press by Clemson Extension. LGP 1078. Clemson, SC, USA: Clemson Cooperative Extension. pp 11. http://lgpress.clemson.edu/publication/sealed-timber-bids-what-you need-to-know-to-sell-your-timber.
Klimas, K., P.Hiesl, D. Hagan, and D. Park. 2020. Prescribed fire effects on sediment and nutrient exports in forested environments: A review. Journal of Environmental Quality, 49(4): 793-811.
Klimas, K., P. Hiesl, D. Hagan, and D. Park. 2020. Immediate effects of prescribed fire on sub-surface water quality in a managed yellow pine forest. Fire, 3(14): pp 12.
Hiesl, P. and J. Steele. 2020. Timber Harvesting Equipment in South Carolina. Land-Grant Press by Clemson Extension. LGP 1056. Clemson, SC, USA: Clemson Cooperative Extension. pp 14. https://lgpress.clemson.edu/publication/timber-harvesting-equipment-in-south-carolina/.
Hiesl, P. and S. Pohlman. 2020. An introduction to timber sale contracts. Land-Grant Press by Clemson Extension. LGP 1055. Clemson, SC, USA: Clemson Cooperative Extension. pp 6. https://lgpress.clemson.edu/publication/an-introduction-to-timber-sale-contracts/.
Hiesl, P. 2020. A brief summary of the 2017 South Carolina logging business survey. Land-Grant Press by Clemson Extension. LGP 1048. Clemson, SC, USA: Clemson Cooperative Extension. pp 6. http://lgpress.clemson.edu/publication/a-brief-summary-of-the-2017-south-carolina-logging-business-survey/.
Hiesl, P. 2019. South versus North. Northern Woodlands. Summer 2019: 16-17.
Hiesl, P. 2019. No logging job too small. Forest Landowner, 78(2): 10-14.
Hiesl, P. and S.L. Rodriguez. 2019. Quantifying the impact of a flood and hurricane event on Tree Farms in South Carolina: A Survey. Forests, 10(7): pp 15.
Koirala, A., A.R. Kizha, C.F. de Hoop, B.E. Roth, H.-S. Han, P. Hiesl, D. Abbas, S. Gautam, S. Baral, S. Bick, and K. Sahoo. 2018. Annotated bibliography of the global literature on the secondary transportation of raw and comminuted forest products (2000 – 2015). Forests, 9(7): pp. 28.
Conrad, J.L., W.D. Greene, and P. Hiesl. 2018. The Evolution of Logging Businesses in Georgia 1987-2017 and South Carolina 2012-2017. Forest Science, 64(6): 671-681.
Hiesl, P. 2018. A look at Swiss forests. Northern Woodlands, Autumn 2018: 18-19.
Hiesl, P. 2018. A survey of forestry extension clientele in South Carolina, USA. Small-Scale Forestry, 17: 309-321.
Conrad, J.L., W.D. Greene, and P. Hiesl. 2018. A review of changes in U.S. Logging Businesses 1980s-Present. Journal of Forestry, 116(3): 291-303.
Hiesl, P., M.S. Crandall, A. Weiskittel, and A.R. Kizha. 2017. Assessing alternative silvicultural prescriptions for mid-rotation, unthinned, spruce-fir stands in Maine. Forests, 8(10): pp 15.
Hazard-Daniel, S.W., P. Hiesl, S.C. Loeb, and T.J. Straka. 2017. An Incremental Economic Analysis of Establishing Early Successional Habitat for Biodiversity. Resources, 6(4): pp 14.
Hiesl, P., M.S. Crandall, A. Weiskittel, J.G. Benjamin, and R.G. Wagner. 2017. Evaluating the long-term influence of alternative commercial thinning regimes and harvesting systems on projected net present value of precommercially thinned spruce-fir stands in northern Maine. Canadian Journal of Forest Research, 47: 203-214.
Harris, A.B. and P. Hiesl. 2016. Ask Twice, Cut Once. Forest Landowner, 75(3): 28-35.
Hiesl, P. and J.G. Benjamin. 2015. Can technology help improve grapple skidder and stroke delimber interactions? A simulation approach. International Journal of Forest Engineering, 26(3): 171-184.
Hiesl, P., T. Waring, and J.G. Benjamin. 2015. The effect of hardwood component on grapple skidder and stroke delimber idle time and productivity – An agent based model. Computers and Electronics in Agriculture, 118: 270-280.
Hiesl, P. and J.G. Benjamin. 2015. Estimating processing times of harvesters in thinning operations in Maine. Forest Products Journal, 65 (3/4): 180-186.
Hiesl, P., J.G. Benjamin, and B.E. Roth. 2015. Evaluating harvest costs and profit of commercial thinnings in softwood stands in west-central Maine: A case study. The Forestry Chronicle, 91 (2): 150-160.
Hiesl, P. and J.G. Benjamin. 2013. Applicability of international harvesting equipment productivity studies in Maine, USA: A literature review. Forests, 4(4): 898-921.
Hiesl, P. and J.G. Benjamin. 2013. A multi-stem feller-buncher cycle-time model for partial harvest of small-diameter wood stands. International Journal of Forest Engineering, 24 (2): 101-108.