William Michael Sullivan

William Michael Sullivan

4.9
Rating: 10.0

Licensed for 33 years

Family Lawyer at SAYVILLE, NY
Practice Areas: Family, Divorce & Separation, Marriage & Prenuptials

173 NORTH MAIN STREET - SUITE 317, SAYVILLE, NY

About William

Biography

Practice Areas

3

Practice Areas

Fees and Rates

Cost

Hourly Rates

$ 200-495 per hour

Retainer

Always


Payment Methods

  • Cash
  • Check
  • Credit Card

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Licenses

Licensed in New York for 33 years

State: New York

Acquired: 1992

Delinquent

No misconduct found

Location

The Law Office of William M. Sullivan

173 NORTH MAIN STREET - SUITE 317, SAYVILLE, NY, 11782

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William Michael Sullivan's Reviews

Avvo Review Score

4.9 /5.0

33 Client Reviews

Filter Avvo Reviews (33) Refine reviews to match your needs. Use the filters to quickly surface reviews that align with your case or priorities.

Showing 6 - 10 of 14 reviews | Practice Area Knowledge

Posted by Michael | February 12, 2018 | Hired Attorney | Divorce & Separation

A True Blessing

I first met Will about three years ago. My spouse was using at least two, possibly three mind altering drugs at the time. She was willing to lie, cheat and steal to get whatever she could out of me. She had no problem signing false statements and testifying falsely in court. I informed Will that I a...m a Christian man and will not be anything less than truthful during my divorce proceedings. Never once has Will tried to get me to sacrifice my integrity for any reason. He successfully had my spouse's case thrown out of court. We still have a little more work to do, but thanks to Mr. Sullivan the situation is looking much brighter for me. I believe whole-heartedly that The Lord sent Will my way.

Posted by anonymous | January 30, 2018 | Hired Attorney | Divorce & Separation

He Is My Hero

If you need a family law attorney, look no further than Will Sullivan. His impressive credentials and reputation speak for themselves, but he goes way beyond that. I will try to describe my lawyer, who has quickly become so much more. Though words won’t do him or his work justice, here it is. I had t...he honor of meeting him four years ago and my life changed. I suddenly had a bull in my corner ready to fight, a coach cheering me on, a light at the end of the very long, exhausting tunnel of post-divorce litigations. He is steadfast; my rock and can of spinach. He listens to me and has learned the type of person and parent I am, which means a lot. He helped me through many difficult times (legally 2 visitation petitions and a child support recalculation...and we won all of them). What continues to impress me is his continued support even after the hearings are over. He is always available and helps me navigate the sometimes choppy waters of co-parenting. Will is a professional like no other and I’m proud to be his client. He’s the guy to have in your corner. I’m grateful he’s in mine.

Posted by Wen C. | July 14, 2016 | Hired Attorney | Divorce & Separation

Will Sullivan is an Excellent Lawyer indeed!

Will Sullivan's knowledge and expertise in Family divorce law has helped me through a difficult time. He has been reliable, accessible and aggressive when it was needed and all with a sense of humor at the same time. He's also a true kind-heart man and lawyer that i ever met. I would highly recomm...end Will for representation, he also has an excellent paralegal Lisa Oppici. Thank you again both of you Will and Lisa! i will always appreciate your help and support for my divorce case!

Posted by Randy | April 22, 2015 | Divorce & Separation

Honest, Even When Not in his Self Interest

I came to Mr. Sullivan today seeking a second opinion about the actions of my current divorce attorney, a local country lawyer. Two financial advisers had criticized the guy. So I asked two other local attorneys, who both said that my attorney had made a costly mistake. Sounded pretty damning, but... I had a gut feeling I should check further, since other parts of their advice did not check out. So I got another recommendation from a source I could trust, who pointed me to Mr. Sullivan... for a third second opinion. Mr. Sullivan did NOT try to poach me as a client. Instead, he told me that my local country lawyer had actually done exactly the right thing. He did not try to undermine my confidence in my own attorney, even tho' that might have got him my business, and that was exactly what two other attorney's tried to do. Instead, he explained how the point in question worked in the Suffolk County courts, and why he would have done pretty much the same thing.

Posted by anonymous | November 24, 2014 | Divorce & Separation

Excellent Representation in Divorce

Will represented me in a divorce action. This was a drawn out, contested case that went to trial. He was the second attorney I hired as my first attorney was non-responsive and did not deliver the service I expected of them. Will, on the other hand, has continuously kept me informed and delivered ex...cellent results. Will is someone with integrity, who has kept his word and was impressive in the courtroom. I would highly recommend him in any matrimonial action.

See All Client Reviews

William Michael Sullivan's Lawyer Endorsements

Endorse William
Somair Syed Alam headshot
Somair Alam

Family lawyer | Feb 13

Relationship: Fellow lawyer in community

"Very knowledgeable family law attorney, dedicated to his clients' success."

Catherine E. Miller headshot
Catherine Miller

Divorce and separation lawyer | Sep 24

Relationship: Fellow lawyer in community

"Ms. Sullivan is highly respected by his colleagues for his professional conduct, intelligence and tenacious representation of his client."

Karen Svendsen headshot
Karen Svendsen

Divorce and separation lawyer | May 15

Relationship: Co-worker

"I endorse this lawyer. Mr. Sullivan is an extremely tough and competent litigator who stops at nothing to pursue the rights of his clients. In addition, Mr. Sullivan has integrity and always treats his clients with the utmost respect and personal attention. I highly recommend this attorney for any Family Law matter."

Ettore A. Simeone headshot
Ettore Simeone

Divorce and separation lawyer | May 12

Relationship: Fellow lawyer in community

"I endorse this lawyer. Will is truly on of the finest attorneys I have ever met in my 32 years of legal practice. He is a wealth of knowledge about any aspect of Family Law and i often call him when I have a complex legal question to get his learned opinion, which I highly respect. He is always willing to assist a colleague. He is highly ethical and competent. I respect him greatly and give him my highest endorsement."

View All Endorsements
Brittany A. Fiorenza Esq. headshot
Brittany Fiorenza

Divorce and separation lawyer

Experience

Rating:  10.0 (Superb)

Honors

2014

Top Attorneys in Long Island, Legal Leaders

1992

Trial Advocacy, Villanova University School of Law

1991

Moot Court Board, Villanova University School of Law

Work Experience

2003 - Present

Partner, Long Tuminello, LLP

2001 - 2003

Managing Partner, William M. Sullivan, P.C.

1992 - 2001

General Counsel/Director of Compliance, AMBAC Financial Services, Inc.

Associations

2014 - 2015

Suffolk County Matrimonial Bar Association

President

2013 - 2014

Suffolk County Matrimonial Bar Association

Vice President

Sample of Legal Cases

O'Loughlin v. Sweetland App Div 2nd Dept. 2009-02720

Appellate Division Reversed

See More Legal Cases

Education

1992

Villanova

JD - Juris Doctor

1987

University of Notre Dame

BBA - Bachelor of Business Administration

Speaking Engagements

2014

Hot Button Topics in Matrimonial and Family Law - November 7, 2014 Hague Convention and Other International Treaties and laws and effects on counseling clients

2010

Matrimonial Boot Camp

Financial Disclosure

Publications

2014

Legal Leaders Legal Leaders: Long Island Top Rated Lawyers

Languages

English

Activity

Avvo Rating

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Avvo Rating Levels
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