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 - 4 of 4 reviews | Staff & Support

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 Stephanie | December 28, 2015 | Hired Attorney | Divorce & Separation

Attorney William Sullivan

I was fortunate to be introduced to attorney William Sullivan by a friend. At the time of our meeting I had gone through a divorce sharing a lawyer with my ex-husband who assured me I would be fairly represented and taken care of. That was not the case. I was at my wits end, worried for both of my... children, myself and our future. Several lawyers advised me nothing could be done to change the stipulations of the agreement. However upon meeting Mr. Sullivan I was made aware that I was not protected and my rights violated. He assured me he could help me and my children and we would be protected under the law. He is an extraordinary individual who makes you feel you are completely protected under his guidance. His integrity and character are beyond exceptional. Will and his staff are always available, communicate promptly and are thorough when explaining any legal processes or terminologies you may question. I have every confidence he always has his client's best interests in mind. I am thankful to have him representing me and would absolutely recommend him to anyone looking for legal representation.

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 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.

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
  • Legal community recognition Peer endorsements, associations, awards
  • Legal thought leadership Publications, speaking engagements
  • Discipline Disciplinary information may not be comprehensive, or updated. We recommend that you always check a lawyer's disciplinary status with their respective state bar association before hiring them.
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