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Greg Challenger

Principal Marine Scientist/ President

Mr. Challenger is a marine ecologist with expertise in environmental resource management, coral reef damage assessment, oil and chemical spill assessment and habitat restoration. Mr. Challenger has been involved in assessing NEARLY 200 large oil spill, pipeline, railroad and ship grounding incidents in the past 30 years, working with government and industry to study impacts and find restoration-based solutions to environmental casualties.  His career spans from post-graduate studies in the Prince William Sound in 1990 with the US National Marine Fisheries Service following the Exxon Valdez to being the lead investigator for the Shoreline Natural Resource Damage Assessment for BP during the Deepwater Horizon Oil Spill in the Gulf of Mexico from 2010-2015.

Mr. Challenger helped form Polaris Applied Sciences in 1998 and is currently the President. Prior to forming Polaris, Mr. Challenger taught marine resource management and coral reef ecology at the Center for Marine Resource Conservation in the Turks and Caicos, BWI, the Newfound Harbor Marine Institute in the Florida Keys, and aboard the SSV Westward in the Eastern Caribbean for the Semester at Sea program accredited by Boston University


Master of Science, 1990, Florida Institute of Technology, Science Education/Marine Ecology

Bachelor of Science, 1985, Florida Atlantic University, Marine Biology


Society of Wetland Scientists

Certified Professional Wetland Scientist

Maritime Law Association of the United States

IberoAmerican Maritime Law Association

National Association of Underwater Instructors (NAUI) SCUBA Instructor

Society for Ecological Restoration


Challenger , G.E., Gmur S.,  Taylor., E.  2021. A review of Gulf of Mexico shoreline erosion studies following the 2010 Deepwater Horizon oil spill and comparison to 4 years of shoreline loss data from 2011-2015. Marine Pollution Bulletin. 164 (2021) 111983

Dunford, R.W, Gmur S.G., Lynes, M.K., Challenger, G.E. and M.A.  Dunford. 2019. Natural Resource Damages from Oil Spills in the United States. Environmental Claims Journal, Volume 31, 2019 - Issue 2

Michel J, Owens EH, Zengel S, Graham A, Nixon Z,. Andrew Graham, Zachary Nixon, Teresa Allard, William Holton1, P. Doug Reimer, Alain Lamarche, Mark White, Nicolle Rutherford, Carl Childs, Gary Mauseth, Greg Challenger, Elliott Taylor  2013. Extent and Degree of Shoreline Oiling: Deepwater Horizon Oil Spill, Gulf of Mexico, USA. PLoS ONE 8(6): e65087. doi:10.1371/journal.pone.0065087

Challenger, G.E., Sergy, G. and A. Graham. 2008. Vegetation response and sediment polycyclic aromatic hydrocarbon attenuation in a Carex marsh in Howe Sound, British Columbia, Canada Following a spill of Bunker C fuel oil. Proceeding of the 2008 International Oil Spill Conference, May 2008, Savannah, GA.

Challenger, G.E. 2006. Mitigating claims for damage to coral reefs from vessel groundings, salvage and wreck removal in the US. In GARD News Issue 182 May/July 2006, Pg. 4-8. Arendal, Norway.

Mauseth, G.S. and G. E. Challenger. 2001. Trends in Rescinding Seafood Harvest Closures Following Oil Spills. Proceedings 2001 International Oil Spill Conference, Amer. Petr. Institute Pub. No. 14710, Washington, DC.