Office Location

Reviews & Ratings

  • 5.0/5.0

    Had a great experience with Witwer, Oldenburg, Barry & Groom, LLP and highly recommend their firm for business law.

    — Client

John joined Witwer, Oldenburg, Barry & Groom in 1980. Since then he has represented clients in a wide variety of cases, from individuals to institutions, in a wide variety of civil matters, from litigation to complex transactions.

Practice Area

  • Banking Law
  • Personal Injury
  • Commercial Litigation
  • Probate
  • Real Estate


  • University of Colorado J.D., 1980
  • University of Denver M.B.A., 1976
  • University of Notre Dame, B.B.A., 1975

Memberships and Honors

  • A.V. Rated, Preeminent
  • Colorado Supreme Court, Board of Law Examiners, 1993–present
  • President, Weld County Bar Association, 1991–92
  • Executive Council, Young Lawyers Division, Colorado Bar Association, 1981–85
  • Colorado Bar Association
  • Weld County Bar Association
  • Board of Directors,Success Foundation Weld School District 6
  • Board of Directors, Legal Aid Foundation for Colorado
  • Committee on Conduct, United States District Court, District of Colorado,
  • Colorado Bar Foundation Fellow