Judge Judge Thomas Mark O'Diam, Business Attorney in Dayton, Ohio
Over 41 years of legal practice · focused on Business, Estate Planning, and Real Estate · 4.8/5 rating from 4 verified client reviews
Co. J.
Dayton, OH
Practicing business in Dayton since 1985.
- 41+
- Years practicing
- 4.8 ★
- 4 client reviews
- 1
- Bar admission
Practices in
Are you Judge Thomas Mark O'Diam?
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Quick answer
Judge Thomas Mark O'Diam is a co. j. based in Dayton, OH. The practice focuses on Business, Estate Planning, and Real Estate. Judge has over 41 years of legal experience. Rated 4.8 out of 5 from 4 client reviews.
- Based in
- Dayton, OH
- Experience
- over 41 years
- Known for
- Business · Estate Planning · Real Estate
- Handles Business, Estate Planning, and Real Estate matters from Dayton, OH.
- Over 41 years of practice as a licensed attorney.
- Recognized with AV Preeminent.
About Judge Thomas Mark O'Diam: Judge Thomas Mark O'Diam is a co. j. based in Dayton, OH. The practice focuses on Business, Estate Planning, and Real Estate. Judge has over 41 years of legal experience. Rated 4.8 out of 5 from 4 client reviews.
Areas of practice
Practice areas handled by Judge Thomas Mark O'Diam
Thomas concentrates on business, estate planning, real estate, trusts, and probate. Each area below outlines the kind of case Thomas handles, typical outcomes to expect, and how the intake process starts.
Business
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Estate Planning
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Real Estate
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Trusts
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Probate
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Business cases in Dayton, Ohio
Thomas takes business matters in Dayton, Ohio. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.
Estate Planning cases in Dayton, Ohio
Thomas takes estate planning matters in Dayton, Ohio. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.
Real Estate cases in Dayton, Ohio
Thomas takes real estate matters in Dayton, Ohio. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.
Trusts cases in Dayton, Ohio
Thomas takes trusts matters in Dayton, Ohio. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.
Probate cases in Dayton, Ohio
Thomas takes probate matters in Dayton, Ohio. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.
Biography
About Judge Thomas Mark O'Diam — Over 41 years of Ohio business experience
Judge Thomas Mark O'Diam is a co. j. based in Dayton, OH. The practice focuses on Business, Estate Planning, and Real Estate. Judge has over 41 years of legal experience. Rated 4.8 out of 5 from 4 client reviews.
Judge Thomas Mark O'Diam is a lawyer practicing corporate, business, estate planning and 2 other areas of law. Thomas received a B.S. degree from The Ohio State University in 1981, and has been licensed for 41 years. Thomas practices in Dayton, OH.
Thomas's approach to business cases
Judge Thomas Mark O'Diam is a lawyer practicing corporate, business, estate planning and 2 other areas of law. Thomas received a B.S. degree from The Ohio State University in 1981, and has been licensed for 41 years. Thomas practices in Dayton, OH.
Clients Thomas works with
Thomas reviews new inquiries case-by-case for business, estate planning, and real estate matters in Dayton and the surrounding Ohio area.
Credentials
Judge Thomas Mark O'Diam's legal education and bar admissions
University of Dayton
J.D. · 1985
The Ohio State University
B.S. · 1981
Jurisdictions
Thomas's state bar admissions
Ohio
1985 · ACTIVE
Thomas studied at J.D. in University of Dayton and B.S. in The Ohio State University.
Law school and academic background
Thomas completed J.D. in University of Dayton and B.S. in The Ohio State University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Thomas runs in Ohio is where that training gets applied to real client questions.
Recognition
Awards, publications, and recognition of Judge Thomas Mark O'Diam
Thomas has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
AV Preeminent
Legal awards and honors
AV Preeminent.
Locations
Judge Thomas Mark O'Diam's office in Dayton
Thomas's primary office is at 75 Harbert Dr, Dayton, OH, 45440-5116. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Judge Thomas Mark O'Diam — 4.8/5 rating from 4 verified client reviews
Every review below is from a verified client of Thomas. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Dayton.
4.8
4 client reviews
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Judge Thomas Mark O'Diam claims this profile.
Read all reviewsHiring guide
How to hire Judge Thomas Mark O'Diam — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Thomas usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Thomas charges for the initial consult. That fee is credited toward representation if you retain Thomas'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; Thomas will tell you what matters and what doesn't.
Questions to ask a business attorney in Dayton, Ohio
A short list to run through before you commit: How many business 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 Thomas
Thomas discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in business practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every business 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. Thomas confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Thomas's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many business practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Judge Thomas Mark O'Diam
How much does it cost to hire Thomas for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Thomas walks through the likely range during the consult so there are no surprises.
Does Thomas offer a free consultation?
Thomas charges for the initial consult; that fee is credited toward representation if you retain Thomas's office. Some business attorneys offer free consults — check Thomas's current terms during booking.
How long do business cases in Ohio typically take?
Simple business 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. Thomas gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Thomas take my case if I'm outside Dayton?
Thomas is licensed in Ohio. Matters governed by Ohio law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Thomas 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 Thomas?
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. Thomas will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Thomas accepting new business clients right now?
Thomas's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Business attorneys serving Dayton, Columbus and Cleveland in Ohio
Thomas handles business matters throughout Ohio. Each city below is a direct link into the search page for verified business attorneys in that community.
More counsel
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