Parker, Heitz & Cosgrove, PLLC

Attorneys
Many lawyers from all over the state have hired us.

We have been asked to defend them on a wide variety of problems including domestic issues, felony accusations, professional negligence and business litigation.

Mark D. Parker BAR ADMISSION1980

I founded this firm in 1986 and never said “No” to any client who could pay me in the early days. Over the last twenty years I handle matters which are headed for trial. Most we have been able to manage without the need for a trial. Some have gone to trial, and some all the way to an appeal. We can handle all phases. Currently I largely represent commercial and insurance enterprises embroiled in complicated legal matters. Much of my work is representing fellow attorneys in a wide variety of criminal, ethical, domestic and civil matters. Over the last several years I have also conducted hundreds of mediations throughout the state.

Practice Areas
  • Litigation
  • Insurance Defense
  • Federal Criminal Law
Bar Admissions
  • California
  • U.S. District Court, District of Montana
  • Nevada
Honors and Awards
  • Recipient, Haswell Award, State Bar of Montana, 1995
  • Martindale-Hubbell AV Rating
Education
  • University of Montana, B.A., with honors, 1977
  • University of San Diego, J.D., cum laude, 1980
Memberships and Affiliations
  • State Bar of Montana
  • State Bar of Nevada
  • State Bar of California
  • American Bar Association
  • Member, Montana Appellate Defender Commission, 1993-1999
  • Member American College of Trial Attorneys
  • Member American College of Trial Advocates
  • Former Chairman Montana Public Defender Commission

Casey Heitz BAR ADMISSION1996

Casey grew up on a ranch in eastern Montana where he attended a one room country school until sixth grade and junior high and high school in Circle, Montana. His practice focuses primarily on general litigation and select criminal law and family law matters.

Practice Areas
  • General Litigation
  • Business/Commercial Litigation
  • Employment Litigation
  • Contract Disputes
  • Real Property Issues
  • Employment Issues
  • Criminal Law
  • Family Law
Bar Admissions
  • Montana State and Federal Courts
  • Ninth Circuit Court of Appeals
Honors and Awards
  • Mountain States Rising Stars 2008-2009
  • SuperLawyers 2011-2021
  • The Best Lawyers in America 2012-2021
  • Martindale-Hubbell AV Rating
Education
  • B.A. University of Montana 1993 (With Honors)
  • J.D. University of Montana 1996
Membership and Affiliations
  • Montana State Bar (President, New Lawyers Section 1999- 2000)
  • American Bar Association
  • Yellowstone Area Bar Association
  • Montana CLE Commission

Shawn P. Cosgrove BAR ADMISSION1995

Shawn P. Cosgrove is a native Montanan raised in Billings, Montana. He obtained a B.S. degree from Montana State University, in Bozeman, Montana, and his J.D. from Seattle University School of Law in Seattle, Washington. After law school, Shawn clerked for the Honorable Russell C. Fagg in Billings before joining the Yellowstone County Attorney’s Office as a prosecutor. After years of prosecuting serious felony crimes, Shawn entered private practice.

As a lawyer in Billings, Shawn maintains primarily an insurance defense practice, representing insureds and insurers, including cases involving personal injury defense, insurance coverage, the UTPA, and construction defects. He also focuses his practice on representing individuals, businesses, and public entities in litigation throughout Montana involving product liability, employment matters and contract disputes.

Shawn has tried jury and non-jury cases and handled appeals in Montana state and federal courts. Shawn has been recognized in “Best Lawyers in America”, “Mountain States Super Lawyers”, and is recognized as “Distinguished” in Martindale Hubbell.

Practice Areas
  • Insurance defense
  • Insurance law
  • Personal injury -defense
  • Personal injury -plaintiff
  • Construction defect
  • General litigation
  • Commercial litigation
  • Employment litigation
  • Family law
Bar Admissions
  • Montana State and Federal Courts
Honors and Awards
  • Mountain States Super Lawyers
  • The Best Lawyers in America
  • Martindale-Hubbell “Distinguished”
Education
  • B.S. Montana State University 1989
  • J.D. Seattle University School of Law 1995
Memberships and Affiliations
  • Montana State Bar
  • American Bar Association
  • Yellowstone Area Bar Association

Geoff Cunningham BAR ADMISSION2015

Geoff proudly calls Billings his hometown. He attended high school at Billings Central. He earned his Bachelor’s Degree at Montana State University and his Juris Doctorate at the University of Wyoming College of Law.

Geoff first came to work for the firm as a legal intern in the summers following both his first and second years in law school. He became a full-time associate in August of 2015.

Practice Areas
  • General Practice
  • Business Litigation
  • Contract Litigation
  • Criminal Law
  • Insurance Defense
Education
  • Montana State University, B.A., 2011
  • University of Wyoming College of Law, J.D., 2015
Bar Admissions
  • U.S. District Court
  • District of Montana and U.S. Court of Appeals, Ninth Circuit Wyoming

Michael Dunphy BAR ADMISSION2019

Michael is a Southern California native who moved with his family to Belvidere, Tennessee when he was in fifth grade. He earned a Bachelor’s Degree while playing football for Austin Peay State University, and later received his Juris Doctorate from Samford University’s Cumberland School of Law.

Relocating with his wife to Billings, Montana in February 2021, Michael maintains a general civil and criminal litigation practice.

Practice Areas
  • General Civil Litigation
  • Criminal Litigation
Bar Admissions
  • Alabama
  • Montana
Education
  • B.S. Austin Peay State University 2014
  • J.D. Samford University 2019