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William C. Mack

William C. Mack

Practice areas:

Business, Real Estate, Land Use & Zoning

About Me


I am an attorney who specializes in small business law, real estate transactions and land use planning law.


I am also an experienced executive and developer of independent electric power projects, using renewable and fossil fuels.



Practice Areas

Licensed since 1974

  1. Business: 50%
    20 years, 150 cases
  2. Real Estate: 30%
    9 years, 100 cases
  3. Land Use & Zoning: 20%
    7 years, 15 cases



Hourly ($225-275/hour), Fixed (Sometimes), Free Consultation (30 minutes)

Payment Types:


Attorney Endorsements

4 total 

  • Hovanes Margarian

    I endorse this lawyer.


    Hovanes Margarian Consumer Protection Attorney
    Relationship: Fellow lawyer in community

  • Daniel Scott Orlow

    I endorse this lawyer.


    Daniel Orlow Employment & Labor Attorney
    Relationship: Other

Contact Info

5 Bowling Green Parkway
Lake Hopatcong, NJ, 07849




Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.

Avvo Contributions

Legal Answers


Award NameGrantorDate Granted
David Amram Prize in Civil ProcedureUniversity of Pennsylvania Law School1974

Work Experience

TitleCompany NameDuration
Solo PractitionerLaw Offices of William c. Mack2006 - 2010
PrincipalLonglake Consulting2003 - 2006
Senior Vice PresidentEl Paso Corporation2002 - 2002
Chief Executive OfficerCoastal Power Company1999 - 2001
Chief Operating OfficerCoastal Power Company1998 - 1999
COO-InternationalSithe Energies1996 - 1997
Senior Vice PresidentCovanta Energy1985 - 1996
PartnerSchnader Harrison Segal & Lewis1981 - 1985
AssociateSchnader Harrison Segal & Lewis1974 - 1981


Association NamePosition NameDuration
Sussex County Bar AssociationMember2008 - Present
New Jersey State Bar AssociationChair, Solo and Small Firm Section2006 - Present
American Bar AssociationMember1974 - Present

Legal Cases

Case NameOutcome
Distressed Debt PurchaseVery successful for my clients

See all Legal Cases 


School NameMajorDegreeGraduated
University of Pennsylvania Law SchoolLawJD - Juris Doctor1974
Brown UniversityPhysicsA.B.1969

Speaking Engagements

Conference NameTitleDate
New Jersey State Bar Association, Solo and Small Firm SectionHow to Use Technology to Better Serve Your Clients2013
Annual Meeting, New Jersey State Bar AssociationProtecting Your Clients' Data - Disaster Preparedness2013
Technology SypmosiumShopping the App Store2012
Annual Conference Solo and Small Firm SectionTech for a Successful Law Practice2012
Suddenly SuccessfulTechnology-What You Need2011
Annual Conference, Solo and Small Firm SectionLaw Firm Management Software in the Cloud2011