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 1 - 5 of 17 reviews | Recommendation

Posted by Ann | November 09, 2020 | Divorce & Separation

EXCELLENT!

Will came highly recommended by an attorney friend of mine. I consulted with Will for a separation agreement. He was patient, empathic, and provided excellent advice without any pressure. It was obvious during our conversations that he loves his work and is truly interested in helping people. I am... planning to hire Will to handle my case, he has extensive experience, he is tenacious when advocating for his clients, and understands the importance of building relationships. I know I will be in capable hands!

Posted by Meredith | September 27, 2020 | Hired Attorney

Breathe again

I hired Will when a close friend recommended him to me when my original attny wasn’t getting me anywhere and couldn’t handle the other side. Will changed my life, gave me freedom, great advice, clever, sharper than a tack. His knowledge base and passion is so easy to see and feel.

Posted by Matthew | September 24, 2018 | Hired Attorney | Family

Best of the Best

Will has been a true savior, guiding me like a true professional and friend during this difficult time. Even when emotions can distract you from the right course of action, Will was there to listen and help me do what was right for my daughter. He has been by myside during all the proceedings and alw...ays available at any time to back me up. He is a true safety blanket that is always one step ahead. He is aggressive and tactful backed up with professionalism and efficiency. Many times he has put my fears to rest after being faced with difficult decisions in this tough tribulation. Will was always been truthful and out for my best interests, clearly exsplaining everything to me and getting the exact results he said he would. Without a doubt, I would want no one else but him in my corner during tough times.

Posted by Kerry | August 22, 2018 | Hired Attorney | Divorce & Separation

Do nit hire

William Sullivan and Kevin Warner of Long Tuminello were my divorce attorneys. They neglected to return phone calls, escalated fees and prolonged a horrible experience. As a litigation paralegal for over 20 years I know a competent lawyer and I did not see that in either of them. I drafted my own co...urt documents and prepared myself for deposition. They did little to assist. In fact, they hindered my case by not being prepared in court, at conferences and in deposition. Do not hire. Should have filed complaint w/ bar association.

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.

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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  • Experience & background Years licensed, work experience, education
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