Melissa Chan O'Sullivan, Business Attorney in Oakland, California
Over 21 years of legal practice · focused on Business, Family Law, and General · 4.0/5 rating from 1 verified client review
Kaiser Found. Health Plan, Inc.
Oakland, CA
Practicing business in Oakland since 2005.
- 21+
- Years practicing
- 4.0 ★
- 1 client review
- 2
- Bar admissions
Practices in
Are you Melissa Chan O'Sullivan?
This profile was built from public bar records and is still unclaimed. Claim it free to control your photo, bio, and fees — and get client inquiries sent straight to you.
Quick answer
Melissa Chan O'Sullivan is a kaiser found. health plan, inc. based in Oakland, CA. The practice focuses on Business, Family Law, and General. Melissa has over 21 years of legal experience. Rated 4.0 out of 5 from 1 client review.
- Based in
- Oakland, CA
- Experience
- over 21 years
- Known for
- Business · Family Law · General
- Handles Business, Family Law, and General matters from Oakland, CA.
- Over 21 years of practice as a licensed attorney.
- Recognized with Peer Reviewed.
About Melissa Chan O'Sullivan: Melissa Chan O'Sullivan is a kaiser found. health plan, inc. based in Oakland, CA. The practice focuses on Business, Family Law, and General. Melissa has over 21 years of legal experience. Rated 4.0 out of 5 from 1 client review.
Areas of practice
Melissa's practice areas in Oakland
Melissa concentrates on business, family law, general, ip, and litigation. Each area below outlines the kind of case Melissa handles, typical outcomes to expect, and how the intake process starts.
Business
View other Business attorneys
Family Law
View other Family Law attorneys
General
View other General attorneys
IP
View other IP attorneys
Litigation
View other Litigation attorneys
Business cases in Oakland, California
Melissa takes business matters in Oakland, California. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Melissa agrees to represent you.
Family Law cases in Oakland, California
Melissa takes family law matters in Oakland, California. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Melissa agrees to represent you.
General cases in Oakland, California
Melissa takes general matters in Oakland, California. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Melissa agrees to represent you.
IP cases in Oakland, California
Melissa takes ip matters in Oakland, California. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Melissa agrees to represent you.
Litigation cases in Oakland, California
Melissa takes litigation matters in Oakland, California. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Melissa agrees to represent you.
Biography
Melissa Chan O'Sullivan, business attorney serving Oakland
Melissa Chan O'Sullivan is a kaiser found. health plan, inc. based in Oakland, CA. The practice focuses on Business, Family Law, and General. Melissa has over 21 years of legal experience. Rated 4.0 out of 5 from 1 client review. Melissa works from Oakland, California and takes on business matters across the region.
Melissa Chan O'Sullivan is a lawyer practicing commercial litigation, antitrust, intellectual property and 2 other areas of law. Melissa received a B.A. degree from Princeton University in 2000, and has been licensed for 21 years. Melissa practices in Oakland, CA.
How Melissa handles business matters
Melissa Chan O'Sullivan is a lawyer practicing commercial litigation, antitrust, intellectual property and 2 other areas of law. Melissa received a B.A. degree from Princeton University in 2000, and has been licensed for 21 years. Melissa practices in Oakland, CA.
The kind of cases Melissa takes
Melissa reviews new inquiries case-by-case for business, family law, and general matters in Oakland and the surrounding California area.
Credentials
Credentials — where Melissa studied and practices
New York University School of Law
J.D. · 2004
Princeton University
B.A. History · 2000
Jurisdictions
Melissa's state bar admissions
Massachusetts
2014 · ACTIVE
California
2005 · ACTIVE
Melissa studied at J.D. in New York University School of Law and B.A. History in Princeton University.
Law school and academic background
Melissa completed J.D. in New York University School of Law and B.A. History in Princeton University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Melissa runs in California is where that training gets applied to real client questions.
Recognition
Melissa's legal honors and published work
Melissa has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
Peer Reviewed
Legal awards and honors
Peer Reviewed.
Locations
Melissa Chan O'Sullivan's office in Oakland
Melissa's primary office is at 1 Kaiser Plz 19th Fl, Oakland, CA, 94401-3284. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Melissa Chan O'Sullivan — 4.0/5 rating from 1 verified client review
Every review below is from a verified client of Melissa. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Oakland.
4.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Melissa Chan O'Sullivan claims this profile.
Read all reviewsHiring guide
How to hire Melissa Chan O'Sullivan — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Melissa usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Melissa charges for the initial consult. That fee is credited toward representation if you retain Melissa'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; Melissa will tell you what matters and what doesn't.
Questions to ask a business attorney in Oakland, California
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 Melissa
Melissa 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. Melissa confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Melissa'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 Melissa Chan O'Sullivan
How much does it cost to hire Melissa for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Melissa walks through the likely range during the consult so there are no surprises.
Does Melissa offer a free consultation?
Melissa charges for the initial consult; that fee is credited toward representation if you retain Melissa's office. Some business attorneys offer free consults — check Melissa's current terms during booking.
How long do business cases in California 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. Melissa gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Melissa take my case if I'm outside Oakland?
Melissa is licensed in California. Matters governed by California law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Melissa 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 Melissa?
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. Melissa will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Melissa accepting new business clients right now?
Melissa'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 Oakland, Los Angeles and San Francisco in California
Melissa handles business matters throughout California. Each city below is a direct link into the search page for verified business attorneys in that community.
- Oakland5,709 attorneys
- Los Angeles39,975 attorneys
- San Francisco26,380 attorneys
- San Diego16,903 attorneys
- Sacramento10,561 attorneys
- Irvine6,831 attorneys
- San Jose5,009 attorneys
- Palo Alto4,084 attorneys
- Beverly Hills3,348 attorneys
- Newport Beach3,106 attorneys
- Pasadena2,894 attorneys
- Santa Monica2,756 attorneys
More counsel
Other top-rated business attorneys in California
If Melissa's intake is full or the fit isn't right, these business attorneys in Oakland handle similar matters. Every profile below is verified and open to consultations.

Michael Shemtoub
Los Angeles, California
5.0· 218

Farid Yaghoubtil
Los Angeles, California
5.0· 155
Douglas MacMillan Borthwick
Santa Ana, California
5.0· 118

David Payab, Esq.
Woodland Hills, California
5.0· 108

Arsen Sarapinian, Esq.
Beverly Hills, California
5.0· 100

Jonathan P. Brian
Garden Grove, California
5.0· 74