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About me

Joseph Maternowski serves as Chair of Hessian & McKasy's Environmental Law Practice Group.  Joe assists clients on a range of issues ranging from administrative matters before state and federal agencies to transactional matters and litigation.  Joe is very experienced in dealing with the Minnesota Pollution Control Agency (MPCA) and the U.S. Environmental Protection Agency (EPA).  Joe provides packages of legal services with fixed fees and also works on an hourly basis.  Details about packages can be found on his website at where you can also find more infomation about his practice and work as an environmetal lawyer.

Joe is frequently asked to speak at seminars and has a lengthy list of publications related to environmental law, liability and compliance.

Joe practices at Hessian & McKasy which is a boutique law firm located in Minneapolis, Minnesota.  Joe's works with his colleagues at Hessian & McKasy who can assist on a range of legal matters including: business, litigation, employment, real estate matters.    


Practice areas


  1. Environmental and Natural Resources: 50%
    30 years, 900 cases
  2. Real Estate: 30%
    30 years, 500 cases
  3. Business: 10%
    30 years, 500 cases
  4. Administrative Law: 10%
    30 years, 200 cases



Hourly ($150-360/hour), Fixed (sometimes), Retainer (always), Free consultation (30 minutes)

Payment types:

Cash, Check

Attorney endorsements

1 total 

Are you an attorney? Endorse this lawyer

  • Stephen William Hance

    Joe is an well known and respected environmental lawyer. He has been a resource for me on environmental law issues over the years and I strongly endorse him.


    Stephen Hance Business Attorney
    Relationship: Worked for lawyer

Contact info

Hessian & McKasy, P.A.

3700 RBC Plaza.
60 South 6th Street.
Minneapolis, MN, 55402


MNAuthorized to practice198507/31/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Super LawyerMinnesota Law & Politics Magazine2011
Best Lawyers in America - Environmental LawBest Lawyers in America2009
"Lawsuit of the Year"Minnesota Law & Politics Magazine2005
Work experience
TitleCompany nameDuration
Shareholder, Chair Environmental Law Attorney Practice GroupHessian & McKasy, PA2012 - Present
ShareholderMoss & Barnett, P.A.2000 - 2011
ShareholderHessian & McKasy, P.A.1994 - 1999
AttorneyLindquist & Vennum1991 - 1994
Special Assistant Attorney GeneralOffice of the Attorney General State of Minnesota1984 - 1991
Association namePosition nameDuration
Minnesota State Bar Association, Environmental, Natural Resources and Energy Law SectionChair2009 - 2010
Ramsey County Bar AssociationMember2008 - 2010
Minnesota State Bar AssociationMember1999 - 2010
Hennepin County Bar Association, Environmental Law CommitteeMember1991 - 2010
Industrial Council on Environmental ManagementMember1991 - 2010
Air and Waste Management AssociationMember1991 - 2010
American Bar Association, Section of Natural Resources Energy and Environmental LawMember1985 - 2010
Legal cases
Case nameOutcome
Alfred Schumann v. Sheryl Corrigan, Commissioner Minnesota Pollution Control Agency (Olmsted County, MN Distrct Court 2004)MPCA's Order rescinded. Recovered attorneys fees.
See all legal cases 
Publication nameTitleDate
Moss & Barnett Environmental NewsletterALERT: Environmental Health & Safety News2009
Business & Industry MagazineMaterial Safety Data Sheets-A Road Map to Safety1999
Environmental Liability, Enforcement & Penalties ReporterEnvironmental Liability and Freedom of Information on the Information Superhighway, New Opportunities and Concerns for Business1998
Environmental Liability, Enforcement & Penalties ReporterMinnesota Whistle-Blower Law Shuts Company Files: Corporate Shenanigans or Public vs. Individual Rights1998
Business & Industry MagazineConfidentiality: How Safe Are Your Secrets1998
Business & Industry MagazineSurviving an Inspection1998
The LandFeedlot Inspections1994
Business & Industry MagazineResponding to a Spill1993
School nameMajorDegreeGraduated
Temple University - James E. Beasley School of LawLawJD - Juris Doctor1984
Yale UniversityAmerican HistoryBA1978
Speaking engagements
Conference nameTitleDate
5th Annual Minnesota Environmental InstituteCERCLA/RCRA Update2009
4th Annual Minnesota Environmental InstituteResource Conservation and Recovery Act (RCRA) Basics2008
3rd Annual Minnesota Environmental Law Institute"All Appropriate Inquires" An Environmental Due Diligence Update2007
Environmental Law for Solo and Small FirmsAvoiding Environmental Liability2006
Current Issues in Storm Water Regulation in MinnesotaResponding to Enforcement Actions2006
2nd Annual Minnesota Environmental Law InstituteEqual Access to Justice Act: Attorneys Fees Recovery2006