Contractor Training Store, LLC. is based in Lincoln, Illinois.

It is owned and operated by Douglas J. Ebelherr, R.S., L.E.H.P.   

Doug began his career in Environmental Health at Logan County Health Department, Illinois in January, 1975 and now has over 50 years' experience in onsite wastewater training for both environmental health professionals and onsite wastewater contractors.

He has coordinated and provided onsite wastewater and public health training at the local, state and national levels and is a national leader in the onsite wastewater field. 

Doug has over 28 years of field experience and regulatory agency background as well as over 22 years of private industry experience.

Doug is a Past-President of the Illinois Environmental Health Association (IEHA) and served several years on the Board of Directors. 

Doug is a Past-President of the National Environmental Health Association (NEHA) and served several years on the Board of Directors. 

Doug was a founding member of the Onsite Wastewater Professionals of Illinois (OWPI) and served several years on the Board of Directors. 

Doug has served on the Board of Directors of the National Onsite Wastewater Recycling Association (NOWRA).

Doug was a founding member of the State Onsite Regulators Association (SORA).

Doug also served as a facilitator of the Illinois Private Sewage Disposal Advisory Commission from its inception until his retirement from the Illinois Department of Public Health. 

Doug has been the providing Continuing Education Classes in Illinois for Private Sewage Disposal Installers, Pumpers and Portable Sanitation Technicians since 2014.

In addition, Doug has been asked to share his knowledge of Onsite Wastewater Systems in various venues throughout the country.