Mark S. Deiermann
About Mark S. Deiermann
Mark S. Deiermann is a lawyer based in St. Louis, MO and has been recognized in The Best Lawyers in America® since 2024. Mark S. Deiermann is recognized in the following practice area:
- St. Louis, Missouri
- Commercial Litigation
Current Firm: Bryan Cave Leighton Paisner LLP
Education: University of Utah, J.D., graduated 1981
Location: St. Louis, MO
Nearby Lawyers
Chris Wright has represented victims and their families in complex personal injury, medical negligence, nursing home negligence and wrongful death cases since 1998. Chris is licensed to practice law in Missouri, Illinois, and Kansas (currently inactive). Chris grew up in Oakville in South St. Louis County, and is the son of the late Colonel Allen D. Wright (US Army & MO Army National Guard) and JoAnn Wright. He graduated from CBC High School in 1990, where he was a member of the National ...
Craig Schlapprizzi is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Craig, who practices law in St. Louis, Missouri, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Craig is held by other top lawyers in the same geographic and legal practice area.
Richard D. Watters advises all types of health care clients from large hospital systems to individual physicians, nurses and other health care professionals on various matters including general health care laws and regulations, business operations, contracting, governance and corporate issues, licensing/regulatory compliance, the Stark Law, fraud and abuse, EMTALA, Certificates of Need, medical staff issues, practice and business acquisitions, joint ventures, Medicare and Medicaid conditions ...
Jeremiah W. Nixon is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Criminal Defense: White-Collar and Government Relations Practice. Jeremiah W., who practices law in St. Louis, Missouri, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jeremiah W. is held by other top lawyers in the same geographic and legal practice area.
In his over 30 years of practice, Alan Freed has established himself as one of Missouri's pre-eminent practitioners of mediation and collaborative divorce , and as a leading appellate attorney. Mr. Freed was elected a Fellow of the American Academy of Matrimonial Lawyers in 2009 and is listed in Missouri/Kansas Super Lawyers. Best Lawyers named him Attorney of the Year for Collaborative Law: Family Law in St. Louis in 2013 and for Family Law Mediation for 2015. A mediator since 1985, Mr. Free...
Jim Layton joined the firm in 2017 after serving more than 22 years in the Missouri Attorney General’s Office—nearly all of those as the State’s principal civil appellate lawyer, Solicitor General. Jim practices in both appellate and trial courts, particularly in matters involving complex legal questions, including those arising under the U.S. and Missouri constitutions, Missouri school funding and other education statutes, discrimination laws, and Missouri tax laws. He repr...
James O'Leary is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs, Personal Injury Litigation - Plaintiffs and Product Liability Litigation - Plaintiffs. James, who practices law in St. Louis, Missouri, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which James is held by other top lawyers in the same geographic and legal practice area.
Betty Schaefer draws on not only her significant knowledge of the St. Louis County Probate Division, where she served as legal counsel, but also her considerable experience in private practice to craft arguments that resonate in probate court. Her deep understanding of the probate and trust codes allows her to guide clients through administration and disputes with efficiency and precision. Betty assists clients with estate and trust administration, trust funding, guardianships, and estate pla...
Scott Gray is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property and Patent Law. Scott, who practices law in St. Louis, Missouri, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Scott is held by other top lawyers in the same geographic and legal practice area.
J. Philip Polster is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law and Trademark Law. J. Philip, who practices law in Clayton, Missouri, has been recognized since 2005. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which J. Philip is held by other top lawyers in the same geographic and legal practice area.
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
Build Your Legal Practice with Effective Online Networking
by Jamilla Tabbara
How thoughtful online networking supports sustained legal practice growth.
Reddit’s Lawsuit Could Change How Much AI Knows About You
by Justin Smulison
Big AI is battling for its future—your data’s at stake.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer
Common-Law Marriage in Indiana: Are You Legally Protected?
by Laurie Villanueva
Understanding cohabitation rights and common-law marriage recognition in Indiana.