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 11 - 14 of 14 reviews | Practice Area Knowledge

Posted by anonymous | August 10, 2014 | Child Custody

An Amazing Attorney

My wife and I retained Attorney Sullivan after she was served child custody paperwork related to her previous marriage. We are from out of State and were not familiar with New York child custody laws. I work with attorneys on a daily basis and know that there are good attorneys and bad attorneys ou...t there. Because of my background, my initial meeting with him surrounded me finding out whether he is the type of attorney who is only good at motions to the court (and not a good trial attorney), or is he the type of attorney who is a good trial attorney, one who is going to stand up for your rights and not back down before the Judge and the other attorney. Attorney Sullivan immediately put my wife at ease. He fully explained the court process and described in detail what to expect during this trying period in our lives. I reviewed the cross motions and found that Attorney Sullivan was confidant, articulate and extremely well versed in New York Laws. Attorney Sullivan then represented us at the hearings. Here is where many attorney fail. Many attorneys boast about what they can do and what they are going to do at trial, but I have seen many attorneys fall apart. This was not the case. Attorney Sullivan was absolutely amazing. He continued to exude his confidence, his knowledge of New York Laws and then was still able to keep my wife at ease at the same time (and this is no easy matter!!) At the end of this 2 year ordeal (yes, it sometimes takes that long), we ended up winning EVERY motion that was filed before the court. We were not just a number in Attorney Sullivan’s Office. Attorney Sullivan showed kindness and compassion when we needed him the most. Attorney Sullivan showed and proved to us that he was also an amazing trial attorney. Words cannot describe how thankful we are in finding Attorney Sullivan. If you have the opportunity to retain Attorney Sullivan, you are going to be in excellent hands. Thank you Attorney Sullivan!!!

Posted by chris | June 02, 2014 | Divorce & Separation

present client

Will Sullivan's knowledge and expertise in divorce law has helped me through a difficult time. He has been reliable, accessible and aggressive when it was warranted and all with a sense of humor at the same time. I would highly recommend Will for representation, he also has an excellent paralegal L...isa Oppici.

Posted by Lou | May 12, 2014 | Family

Do you want a lawyer that takes a personal interest AND win your case? Meet Will Sullivan!

I met Will on New Years Eve, about 4 years ago. I retained him to assist on a bogus OOP my ex filed against me. First off I'd like to say one thing that impressed me was his genuine interest in my case, and his availability. It was always easy to reach him and any/all issues, questions and concerns ...were addressed in a timely manner. With his knowledge of family law, he was very reassuring and explained everything in layman's terms. With our first appearance on the OOP case he was able to have it vacated immediately. I was so impressed with not just his knowledge, but with his courtroom mannerisms, that I hired him on 2-3 more cases including a custody case which he helped me win. And with each case he would explain just what needs to be done and how the process works step by step. I would definitely recommend and rehire him if needed. To sum it up, Will Sullivan is an attorney who handles himself professionally in the courtroom, I like to say 'professionally polite'. He can harpoon his adversary in front of a judge without ever raising his voice, he simply allows his knowledge of the law and impeccable timing in presenting his point to shut down the opposition in a professional manner. He is extremely competent with current family law, maintains excellent communication with his clients and truly defends his clients as if they were a member of his personal family. In the past 4 years working with Will, I felt more like a brother/best friend rather then 'just another client or paycheck'. If you want a highly competent attorney that will take your case and handle it like he's personally involved, then you need to meet with Will. I'm sure after meeting with him you will hire him. You will leave his office feeling confident in his ability and professionalism and any stress caused by your current situation, will be greatly reduced after meeting with Will and seeing him in action. Again, I hope to never need his services in the future, but if I do there's no other attorney I would even consider.

Posted by Beth | March 11, 2014 | Divorce & Separation

Will is the BEST attorney out there!

I hired Will to handle my divorce in 2011 and I must say he was the calm in the storm. His confidence, knowledge and sense of humor helped me get through a difficult time. Will negotiated the divorce while paying attention to every detail so as to protect my future. He is fair, honest and respectabl...e. I was very happy with the agreement Will constructed for me and my children. I have since hired Will again to represent me in a child support matter. His rapport with court officers, his peers and magistrates alike demonstrates a level of character, integrity and professionalism not possessed by many. His staff is caring and efficient. I would, and have, recommended Will to anyone I know who finds themselves in need of an attorney. There has never been a day that I doubted my decision to hire him. I have peace in knowing that my divorce and child support matter have been placed in the right hands.

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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
10.0 - 9.0 Superb8.9 - 8.0 Excellent7.9 - 7.0 Very Good6.9 - 6.0 Good5.9 - 5.0 Average4.9 - 4.0 Concern3.9 - 3.0 Caution2.9 - 2.0 Strong Caution1.9 - 1.0 Extreme Caution