Diane K. O'Leary, Business Attorney in Troy, Michigan
Over 42 years of legal practice · focused on Business, General, and Insurance · 4.0/5 rating from 1 verified client review
MemberatBigler Barker, PLLC
Troy, MI
Practicing business in Troy since 1984.
- 42+
- Years practicing
- 4.0 ★
- 1 client review
- 1
- Bar admission
Practices in
Are you Diane K. O'Leary?
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Quick answer
Diane K. O'Leary is a member based in Troy, MI. The practice focuses on Business, General, and Insurance. Diane has over 42 years of legal experience. Currently practicing at Bigler Barker, PLLC. Rated 4.0 out of 5 from 1 client review.
- Based in
- Troy, MI
- Experience
- over 42 years
- Known for
- Business · General · Insurance
- Handles Business, General, and Insurance matters from Troy, MI.
- Over 42 years of practice as a licensed attorney.
- Recognized with Peer Reviewed.
About Diane K. O'Leary: Diane K. O'Leary is a member based in Troy, MI. The practice focuses on Business, General, and Insurance. Diane has over 42 years of legal experience. Currently practicing at Bigler Barker, PLLC. Rated 4.0 out of 5 from 1 client review.
Areas of practice
Practice areas handled by Diane K. O'Leary
Diane concentrates on business, general, insurance, and litigation. Each area below outlines the kind of case Diane handles, typical outcomes to expect, and how the intake process starts.
Business
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General
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Insurance
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Litigation
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Business cases in Troy, Michigan
Diane takes business matters in Troy, Michigan. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Diane agrees to represent you.
General cases in Troy, Michigan
Diane takes general matters in Troy, Michigan. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Diane agrees to represent you.
Insurance cases in Troy, Michigan
Diane takes insurance matters in Troy, Michigan. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Diane agrees to represent you.
Litigation cases in Troy, Michigan
Diane takes litigation matters in Troy, Michigan. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Diane agrees to represent you.
Biography
About Diane K. O'Leary — Over 42 years of Michigan business experience
Diane K. O'Leary is a member based in Troy, MI. The practice focuses on Business, General, and Insurance. Diane has over 42 years of legal experience. Currently practicing at Bigler Barker, PLLC. Rated 4.0 out of 5 from 1 client review.
Diane K. O'Leary is a lawyer practicing litigation, ethics & professional responsibility, business and 2 other areas of law. Diane received a B.A. degree from Wayne State University in 1974, and has been licensed for 42 years. Diane practices at Bigler Barker, PLLC in Troy, MI.
How Diane handles business matters
Diane K. O'Leary is a lawyer practicing litigation, ethics & professional responsibility, business and 2 other areas of law. Diane received a B.A. degree from Wayne State University in 1974, and has been licensed for 42 years. Diane practices at Bigler Barker, PLLC in Troy, MI.
The kind of cases Diane takes
Diane reviews new inquiries case-by-case for business, general, and insurance matters in Troy and the surrounding Michigan area.
Credentials
Diane K. O'Leary's legal education and bar admissions
Thomas M. Cooley Law School
J.D. · 1984
Wayne State University
B.A. · 1974
Jurisdictions
Diane's state bar admissions
Michigan
1984 · ACTIVE
Diane studied at J.D. in Thomas M. Cooley Law School and B.A. in Wayne State University.
Law school and academic background
Diane completed J.D. in Thomas M. Cooley Law School and B.A. in Wayne State University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Diane runs in Michigan is where that training gets applied to real client questions.
Recognition
Awards, publications, and recognition of Diane K. O'Leary
Diane has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
Peer Reviewed
Legal awards and honors
Peer Reviewed.
Affiliations
Diane's professional memberships and bar associations
State Bar of Michigan
membership
Locations
Diane K. O'Leary's office in Troy
Diane's primary office is at 1301 W. Long Lake Rd., Ste. 260, Troy, MI, 48098. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Diane K. O'Leary — 4.0/5 rating from 1 verified client review
Every review below is from a verified client of Diane. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Troy.
4.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Diane K. O'Leary claims this profile.
Read all reviewsHiring guide
How to hire Diane K. O'Leary — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Diane usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Diane charges for the initial consult. That fee is credited toward representation if you retain Diane'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; Diane will tell you what matters and what doesn't.
Questions to ask a business attorney in Troy, Michigan
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 Diane
Diane 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. Diane confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Diane'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 Diane K. O'Leary
How much does it cost to hire Diane for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Diane walks through the likely range during the consult so there are no surprises.
Does Diane offer a free consultation?
Diane charges for the initial consult; that fee is credited toward representation if you retain Diane's office. Some business attorneys offer free consults — check Diane's current terms during booking.
How long do business cases in Michigan 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. Diane gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Diane take my case if I'm outside Troy?
Diane is licensed in Michigan. Matters governed by Michigan law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Diane 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 Diane?
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. Diane will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Diane accepting new business clients right now?
Diane'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 Troy, Detroit and Grand Rapids in Michigan
Diane handles business matters throughout Michigan. Each city below is a direct link into the search page for verified business attorneys in that community.
More counsel
Other top-rated business attorneys in Michigan
If Diane's intake is full or the fit isn't right, these business attorneys in Troy handle similar matters. Every profile below is verified and open to consultations.





