• AESAC Instructors

  • Bill Leedham P.Geo, CESA, QP-ESA

    Head Instructor

    Bill Leedham is the President of Down 2 Earth Environmental Services Inc., and is licensed with the Association of Professional Geoscientists of Ontario (APGO) as a Professional Geoscientist (P. Geo.). Prior to establishing his own consulting firm, Mr. Leedham has worked in senior management positions for a number of environmental engineering and consulting companies.
    Mr. Leedham is registered as a Qualified Person (QP-ESA) with the Ontario Ministry of Environment (MOE), for conducting Environmental Site Assessments and completing Records of Site Condition, in accordance with Ontario Regulations 153/04 and 511/09.
    Mr. Leedham graduated with a Geologic Technologist Diploma from Sir Sandford Fleming College in Lindsay, Ontario. Bill is registered as a Certified Environmental Site Assessor (CESA) with AESAC; and has been teaching AESAC’s nationally accredited Phase 1 ESA Training and Certification course since 2005. Bill is continually updating and upgrading AESAC course materials; developing new training modules; and is a member of AESAC’s Certification and Ethics & Discipline committees.
    Mr. Leedham has over twenty seven years of consulting experience in the areas of environmental site assessments, site remediation, geology, contaminant hydrogeology, geotechnical investigations and building sciences; and has conducted, managed, or peer-reviewed hundreds of ESA, remediation and risk assessment projects across Canada.
    View Bill’s Website: www.down2earthenvironmental.ca

  • Rani Wiedemann M.Env.Sc, P.Ag., CESA

    Upstream Oil & Gas Instructor

    Rani has over 20 years of experience in environmental consulting. She has a master’s degree in Environmental Science from the University of Toronto and obtained her Professional Agrologist (P.Ag.) designation from the Alberta Institute of Agrologists in 2012.

    As a reclamation specialist, Rani manages client reclamation programs and the reclamation certification process in addition to soil and vegetation Detailed Site Assessments, Environmental Site Assessments, contaminant investigations and waste management. Her experience includes assessment and remediation of upstream, downstream and commercial sites.