Wimer, Jeff

Senior Instructor II
Manager of Student Logging Program

Office Location: 
Peavy 025
Email Address: 

BS, 1983, Oregon State University

Professional Affiliations

  • Oregon Logging Conference – Vice-president
  • Pacific Logging Congress – Vice President
  • Western Region Council on Forest Engineering - Chairman
  • OR-OSHA Safety Code Committee - member
  • College of Forestry Safety Committee
  • College of Forestry Logging Sports - advisor
  • Jerry Sedlack Memorial Scholarship Committee – member
  • Washington Labor and Industries Logger Safety Initiative
  • OHSU CROET OR-Face program
Areas of Interest: 

Logging unit layout and design, harvesting systems/payload analysis, logging safety, forest truck transportation.

Current Programs: 

Analysis of machinery utilized as anchoring systems for cable logging operations

Tethered assisted steep slope logging operations

Pacific Logging Congress, “In the woods show” 2018

  • FE 405 – Mechanized Harvesting and Simulations
  • FE 370/371 - Harvest Operations
  • FE 471 - Harvesting Management
Recent Publications: 

Leshchinsky, B. J. Sessions, and J. Wimer. 2015. Analytical design charts for mobile anchor systems. In press. Int. J. of For. Engr. On line April 8, 2015. DOI: 10.1080/14942119.2015.1023014.

Lyons, K., J. Sessions, and J. Wimer. 2014. The adequacy of falling object protection design criteria for feller bunchers. Forest Science 60(4):757-763. Published online October 2013 (http://dx.doi.org/10.5849/forsci.12-110).

Wing, M. G., M. Craven, J. Sessions, and J. Wimer. 2013. LiDAR-derived DEM and raw height comparisons along profile corridor gradients within a forest. Journal of Geographic Information System 5(2):109-116. Published online April 2013 (http://www.scirp.org/journal/jgis).

Lyons, K., J. Sessions, and J. Wimer. 2012. Effect of undercut style and post hinge behavior in tree felling. Forest Science 58(6):547-558, published online Feb 2, 2012; http://dx.doi.org/10.5849/forsci.11-005.

Terry R. Hammond, Gary Rischitelli, Jeff A. Wimer Defining Critical Safety Behaviors in a Point-of-view Video Observation Study of Tree Fallers at Work International Journal of Occupational and Environmental Health. October/December 2011.

Sessions, J., J. Wimer, F. Costales and M. G. Wing. 2010. Engineering Considerations in Road Assessment for Biomass Operations in Steep Terrain. Western J. of Applied Forestry 25(3):144-153.

Sessions, J., J. Wimer, and K. Boston 2009. Increasing Value and Reducing Costs through Hauling Longer Logs: Opportunities and Issues. Western Journal of Applied Forestry 24(3):157-162.

Refereed Publications (Under Review)

Leshchinsky. B. J. Sessions, J. Wimer and M. Clausn. 2015. Designing Mobile Anchors to Yield: A Tension Relief System for Tail Anchoring. Under review. Croation J. of Forest Engineering.

Non-Refereed Publications

Kellogg, L., J. Sessions, and J. Wimer. 2010. Operational Considerations in Thinning. Western Forester 55(4):4-6.

Rischitelli, Gary, T. Hammond and J. Wimer. 2009. Fallers Point-of-View Video Observation Study. Pacific Northwest Agriculture Safety and Health Center, 25pp.

Industry Communications

Wimer, J. A. 2013 Timber faller killed while working under a hung tree limb

Wimer, J.A. and Pilkerton, Steve 2008. Western States Total Case Incident Rate and Accident Information. 7pp.

Wimer, J. A. 2008. Young logger killed when yarder topples over backwards http://www.ohsu.edu/xd/research/centers-institutes/oregon-institute-occu...

Wimer, J. A. 2006. Choker Setter impaled by sliding log.

Wimer, J. A. 2006. Log Truck Driver killed when brakes fail on Steep grade. http://www.ohsu.edu/xd/research/centers-institutes/croet/outreach/or-fac...

Wimer, J. A. 2006. Mechanic Killed while pouring gas onto a fire.

Wimer, J. A. 2005. Bulldozer movement kills operator standing on track http://www.cdc.gov/niosh/face/stateface/or/05or028.html


Wimer, J. A., Hammond, Terry 2009. Yarding and Loading Safety. Oregon OSHA. 154pp.

Wimer, J. A., Hammond, Terry 2009. Yarding Logging Safety. Oregon OSHA. 54pp.

Wimer, J. A. 2007. Fallers Logging Safety Manual. Oregon Fatality Assessment and Control Evaluation. Center for Research on Occupational and Environmental Toxicology, Oregon Health & Science University. Portland. 47pp.


"Herbicide application" 2015. OSU grant from EPA.

"Careers in the Forest Sector" 2013. OFRI,

"This Is My Office". 2009. Pacific Forest Foundation / Pacific Logging Congress,

"Rigging Logging Towers". 2009.Associated Oregon Loggers,

"Basic Fire Suppression and Safety Training". 2009. Associated Oregon Loggers,