Brian O Connor, Business Attorney in Stamford, Connecticut
Over 58 years of legal practice · focused on Business, Securities, and Tax · 4.4/5 rating from 1 verified client review
MemberatDiserio Martin O'Connor & Castiglioni LLP
Stamford, CT
Practicing business in Stamford since 1968.
- 58+
- Years practicing
- 4.4 ★
- 1 client review
- 1
- Bar admission
Practices in
Are you Brian O Connor?
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Quick answer
Brian O Connor is a member based in Stamford, CT. The practice focuses on Business, Securities, and Tax. Brian has over 58 years of legal experience. Currently practicing at Diserio Martin O'Connor & Castiglioni LLP. Rated 4.4 out of 5 from 1 client review.
- Based in
- Stamford, CT
- Experience
- over 58 years
- Known for
- Business · Securities · Tax
- Handles Business, Securities, and Tax matters from Stamford, CT.
- Over 58 years of practice as a licensed attorney.
- Recognized with BV Distinguished.
About Brian O Connor: Brian O Connor is a member based in Stamford, CT. The practice focuses on Business, Securities, and Tax. Brian has over 58 years of legal experience. Currently practicing at Diserio Martin O'Connor & Castiglioni LLP. Rated 4.4 out of 5 from 1 client review.
Areas of practice
Legal matters Brian takes on
Brian concentrates on business, securities, and tax. Each area below outlines the kind of case Brian handles, typical outcomes to expect, and how the intake process starts.
Business
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Securities
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Tax
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Business cases in Stamford, Connecticut
Brian takes business matters in Stamford, Connecticut. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Brian agrees to represent you.
Securities cases in Stamford, Connecticut
Brian takes securities matters in Stamford, Connecticut. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Brian agrees to represent you.
Tax cases in Stamford, Connecticut
Brian takes tax matters in Stamford, Connecticut. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Brian agrees to represent you.
Biography
Meet Brian O Connor — business lawyer in Stamford
Brian O Connor is a member based in Stamford, CT. The practice focuses on Business, Securities, and Tax. Brian has over 58 years of legal experience. Currently practicing at Diserio Martin O'Connor & Castiglioni LLP. Rated 4.4 out of 5 from 1 client review.
Brian O Connor is a lawyer practicing corporate law, taxation, securities regulation. Brian received a B.A. degree from Providence College in 1965, and has been licensed for 58 years. Brian practices at Diserio Martin O'Connor & Castiglioni LLP in Stamford, CT.
How Brian handles business matters
Brian O Connor is a lawyer practicing corporate law, taxation, securities regulation. Brian received a B.A. degree from Providence College in 1965, and has been licensed for 58 years. Brian practices at Diserio Martin O'Connor & Castiglioni LLP in Stamford, CT.
Who Brian represents
Brian reviews new inquiries case-by-case for business, securities, and tax matters in Stamford and the surrounding Connecticut area.
Credentials
Education, bar admissions, and languages
University of Connecticut
LL.B. · 1968
Providence College
B.A. · 1965
Jurisdictions
Brian's state bar admissions
Connecticut
1968 · ACTIVE
Brian studied at LL.B. in University of Connecticut and B.A. in Providence College.
Law school and academic background
Brian completed LL.B. in University of Connecticut and B.A. in Providence College. Formal legal training is one signal of substantive knowledge — the day-to-day practice Brian runs in Connecticut is where that training gets applied to real client questions.
Recognition
Recognition and thought leadership
Brian has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
BV Distinguished
Legal awards and honors
BV Distinguished.
Affiliations
Brian's professional memberships and bar associations
Greenwich, Regional and Connecticut Bar Associations
membership
Locations
Brian O Connor's office in Stamford
Brian's primary office is at One Atlantic St., Stamford, CT, 06901. In-person meetings are by appointment; a phone intake usually comes first.
Diserio Martin O'Connor & Castiglioni LLP
One Atlantic St.
Stamford, CT 06901
Open in Google MapsClient feedback
Client reviews of Brian O Connor — 4.4/5 rating from 1 verified client review
Every review below is from a verified client of Brian. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Stamford.
4.4
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Brian O Connor claims this profile.
Read all reviewsHiring guide
How to hire Brian O Connor — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Brian usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Brian charges for the initial consult. That fee is credited toward representation if you retain Brian'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; Brian will tell you what matters and what doesn't.
Questions to ask a business attorney in Stamford, Connecticut
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 Brian
Brian 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. Brian confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Brian'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 Brian O Connor
How much does it cost to hire Brian for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Brian walks through the likely range during the consult so there are no surprises.
Does Brian offer a free consultation?
Brian charges for the initial consult; that fee is credited toward representation if you retain Brian's office. Some business attorneys offer free consults — check Brian's current terms during booking.
How long do business cases in Connecticut 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. Brian gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Brian take my case if I'm outside Stamford?
Brian is licensed in Connecticut. Matters governed by Connecticut law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Brian 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 Brian?
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. Brian will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Brian accepting new business clients right now?
Brian'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 Stamford, Hartford and New Haven in Connecticut
Brian handles business matters throughout Connecticut. Each city below is a direct link into the search page for verified business attorneys in that community.
More counsel
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If Brian's intake is full or the fit isn't right, these business attorneys in Stamford handle similar matters. Every profile below is verified and open to consultations.





