About
Robert J. Sullivan has built a distinguished legal career serving the Missoula community since 1980. With an early foundation in public service as a county prosecutor, he transitioned to private practice in 1985 when he joined Boone Karlberg. His practice spans litigation, real estate, commercial, banking law, and employment law.
Sullivan holds a Juris Doctor from the University of Montana School of Law and earned his Bachelor of Arts, with honors, from the University of Montana. His academic achievements laid a strong foundation for a practice defined by legal excellence, client advocacy, and professional integrity across various legal areas.
Throughout his career, Sullivan has represented individuals, businesses, and institutions across a range of complex legal matters. His extensive trial background and deep knowledge of Montana law have made him a trusted advocate in the courtroom and a reliable advisor outside it. His clients benefit from his sharp legal strategy and commitment to achieving favorable outcomes.
Recognized among the top in his field, Sullivan has received the “Lawyer of the Year” award in litigation for banking and finance from Best Lawyers and has been listed by Chambers USA and Mountain States Super Lawyers. He maintains an AV Preeminent rating from Martindale-Hubbell and is listed as one of the best lawyers in America.
Beyond his legal practice, Robert J. Sullivan has contributed significantly to the profession through leadership roles. He has served as president of the State Bar of Montana and the Western Montana Bar Association. Additionally, he is a member of the Montana Supreme Court’s Commission on Character and Fitness, reflecting his dedication to upholding ethical standards within the profession.
Law Office Affiliations
- Shareholder, Boone Karlberg PC
- Member, State Bar of Montana
- Member, Western Montana Bar Association
- Member, Montana Supreme Court’s Commission on Character and Fitness
Licensed State
- Montana
Education
- The University of Montana School of Law
Juris Doctor (JD) - The University of Montana
Bachelor of Arts (BA)
Awards & Badges


- Banking
- Commercial Real Estate
- Residential Real Estate
- Litigation