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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

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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 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.

Main office

1 Kaiser Plz 19th Fl

Oakland, CA 94401-3284

Open in Google Maps

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.

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Hiring 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.

More counsel

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.