
Mariam A. Decker, Appellate Attorney in Columbia, Missouri
Over 36 years of legal practice · focused on Appellate, Business, and Family Law · 5.0/5 rating from 1 verified client review
MemberatOliver Walker Wilson LLC
Columbia, MO
Practicing appellate in Columbia since 1990.
- 36+
- Years practicing
- 5.0 ★
- 1 client review
- 1
- Bar admission
Are you Mariam A. Decker?
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Quick answer
Mariam A. Decker is a member based in Columbia, MO. The practice focuses on Appellate, Business, and Family Law. Mariam has over 36 years of legal experience. Currently practicing at Oliver Walker Wilson LLC. Rated 5.0 out of 5 from 1 client review.
- Based in
- Columbia, MO
- Experience
- over 36 years
- Known for
- Appellate · Business · Family Law
- Handles Appellate, Business, and Family Law matters from Columbia, MO.
- Over 36 years of practice as a licensed attorney.
- Recognized with AV Preeminent.
About Mariam A. Decker: Mariam A. Decker is a member based in Columbia, MO. The practice focuses on Appellate, Business, and Family Law. Mariam has over 36 years of legal experience. Currently practicing at Oliver Walker Wilson LLC. Rated 5.0 out of 5 from 1 client review.
Areas of practice
Mariam's practice areas in Columbia
Mariam concentrates on appellate, business, family law, health care, and insurance. Each area below outlines the kind of case Mariam handles, typical outcomes to expect, and how the intake process starts.
Appellate
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Business
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Family Law
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Health Care
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Insurance
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IP
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Litigation
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Medical Malpractice
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Government
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Appellate cases in Columbia, Missouri
Mariam takes appellate matters in Columbia, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mariam agrees to represent you.
Business cases in Columbia, Missouri
Mariam takes business matters in Columbia, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mariam agrees to represent you.
Family Law cases in Columbia, Missouri
Mariam takes family law matters in Columbia, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mariam agrees to represent you.
Health Care cases in Columbia, Missouri
Mariam takes health care matters in Columbia, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mariam agrees to represent you.
Insurance cases in Columbia, Missouri
Mariam takes insurance matters in Columbia, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mariam agrees to represent you.
Biography
Mariam A. Decker, appellate attorney serving Columbia
Mariam A. Decker is a member based in Columbia, MO. The practice focuses on Appellate, Business, and Family Law. Mariam has over 36 years of legal experience. Currently practicing at Oliver Walker Wilson LLC. Rated 5.0 out of 5 from 1 client review. Mariam works from Columbia, Missouri and takes on appellate matters across the region.
Mariam A. Decker is a lawyer practicing medical malpractice, insurance defense, administrative hearings and appeals and 5 other areas of law. Mariam received a B.S.N. degree from University of Missouri-Columbia in 1977, and has been licensed for 36 years. Mariam practices at Oliver Walker Wilson LLC in Columbia, MO.
How Mariam handles appellate matters
Mariam A. Decker is a lawyer practicing medical malpractice, insurance defense, administrative hearings and appeals and 5 other areas of law. Mariam received a B.S.N. degree from University of Missouri-Columbia in 1977, and has been licensed for 36 years. Mariam practices at Oliver Walker Wilson LLC in Columbia, MO.
Who Mariam represents
Mariam reviews new inquiries case-by-case for appellate, business, and family law matters in Columbia and the surrounding Missouri area.
Credentials
Credentials — where Mariam studied and practices
University of Missouri-Columbia
J.D. · 1990
University of Missouri-Columbia
B.S.N. · 1977
Jurisdictions
Mariam's state bar admissions
Missouri U.S. Distri
1990 · ACTIVE
Mariam studied at J.D. in University of Missouri-Columbia and B.S.N. in University of Missouri-Columbia.
Law school and academic background
Mariam completed J.D. in University of Missouri-Columbia and B.S.N. in University of Missouri-Columbia. Formal legal training is one signal of substantive knowledge — the day-to-day practice Mariam runs in Missouri is where that training gets applied to real client questions.
Recognition
Mariam's legal honors and published work
Mariam has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
AV Preeminent
Legal awards and honors
AV Preeminent.
Affiliations
Mariam's professional memberships and bar associations
Boone County Bar Association The Missouri Bar American Board of Trial Advocates Missouri Organization of Defense Lawyers Defense Research Institute Missouri Association of Hospital Attorneys
membership
Locations
Mariam A. Decker's office in Columbia
Mariam's primary office is at Flatbranch Center, 401 Locust St., Suite 406, Columbia, MO, 65201. In-person meetings are by appointment; a phone intake usually comes first.
Oliver Walker Wilson LLC
Flatbranch Center, 401 Locust St., Suite 406
Columbia, MO 65201
Open in Google MapsClient feedback
Client reviews of Mariam A. Decker — 5.0/5 rating from 1 verified client review
Every review below is from a verified client of Mariam. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing appellate attorneys in Columbia.
5.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Mariam A. Decker claims this profile.
Read all reviewsHiring guide
How to hire Mariam A. Decker — what to expect in your first consultation
Working with a new appellate attorney should feel structured. Here's how the first two conversations with Mariam usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Mariam charges for the initial consult. That fee is credited toward representation if you retain Mariam's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Mariam will tell you what matters and what doesn't.
Questions to ask a appellate attorney in Columbia, Missouri
A short list to run through before you commit: How many appellate matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for Mariam
Mariam discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in appellate practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every appellate matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Mariam confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Mariam's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many appellate practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Mariam A. Decker
How much does it cost to hire Mariam for a appellate case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Mariam walks through the likely range during the consult so there are no surprises.
Does Mariam offer a free consultation?
Mariam charges for the initial consult; that fee is credited toward representation if you retain Mariam's office. Some appellate attorneys offer free consults — check Mariam's current terms during booking.
How long do appellate cases in Missouri typically take?
Simple appellate matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Mariam gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Mariam take my case if I'm outside Columbia?
Mariam is licensed in Missouri. Matters governed by Missouri law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Mariam will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with Mariam?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Mariam will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Mariam accepting new appellate clients right now?
Mariam's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Appellate attorneys serving Columbia, St Louis and Jefferson City in Missouri
Mariam handles appellate matters throughout Missouri. Each city below is a direct link into the search page for verified appellate attorneys in that community.
More counsel
Other top-rated appellate attorneys in Missouri
If Mariam's intake is full or the fit isn't right, these appellate attorneys in Columbia handle similar matters. Every profile below is verified and open to consultations.





