William Michael Sullivan

William Michael Sullivan

4.9
Rating: 8.4

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

5 star (32)
4 star (0)
3 star (0)
2 star (0)
1 star (1)

Posted by Rory | October 9, 2021 | Consulted Attorney

This review is from a potential client who consulted with this attorney.

Great lawyer and an even better person

Will mentored me when I was starting out as an attorney. I didn’t realize how important his lessons were until years went by and I matured as an professional.

Posted by Ann | November 9, 2020 | Consulted Attorney

This review is from a potential client who consulted with this attorney.

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 Carly | October 26, 2020 | Hired Attorney

This review is from a person who hired this attorney.

Just exceptional

Will has been my saving grace. I went through numerous attorneys and have gotten nowhere settling with my ex in family court. Will is educated, fierce, honest, makes himself available for you, and really cares. He has become more than an attorney to me and I consider him a friend. He has always done... what is in my child and my best interest. He really makes you feel good and that he totally has your back and is on your wide 1220 percent. He has a lot of connections in the court room and court system as well which is really helpful. It doesn’t matter if it’s a weekend or 1am if I have to contact with with an emergency he makes himself available for me and my child. I couldn’t ask for a better attorney and friend and I highly recommend him if you are in family court for any reason at all. We are preparing for trial and I know With Will in my corner I feel confident and prepared and ready to win.

Posted by Meredith | September 27, 2020 | Hired Attorney

This review is from a person who hired this 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 Yvonne | December 12, 2019 | Hired Attorney

This review is from a person who hired this attorney.

Excellent attorney!!!

No one enjoys this process and you feel a little lost during the whole thing. Luckily we found Mr. Sullivan. I’ve gone to court numerous times for custody and visitation but never felt at ease even with attorneys. Me. Sullivan was very knowledgeable to current laws and his expertise made my experienc...e as painless as possible. Just want to thank Mr. Sullivan and firm for the professionalism, and giving us piece of mind during these difficult times.

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:  8.4 (Excellent)

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

Our Rating is calculated using information the lawyer has included on their profile in addition to the information we collect from state bar associations and other organizations that license legal professionals. Attorneys who claim their profiles and provide Avvo with more information tend to have a higher rating than those who do not.

What determines Avvo Rating?
  • 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