About Law Office of Dennis J. O'Sullivan P.C

Welcome to Law Office of Dennis J. O'Sullivan P.C, an experienced personal injury law firm serving Bayside, New York. We're dedicated to fighting for the rights of injury victims and securing the compensation they deserve. With a proven track record of successful case outcomes, our attorneys provide compassionate, aggressive representation.

Legal Disclaimer: This website is for informational purposes only. Contacting Law Office of Dennis J. O'Sullivan P.C through this site does not create an attorney-client relationship. Please do not send any confidential information until an attorney-client relationship has been established.

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Practice Areas

  • Auto Accidents

    Car, truck, and motorcycle accident claims

  • Medical Malpractice

    Hospital and doctor negligence cases

  • Slip & Fall

    Premises liability and injury claims

  • Workers' Compensation

    Workplace injury representation

  • Wrongful Death

    Fatal accident and negligence claims

  • Product Liability

    Defective product injury cases

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Client Testimonials

Client

★★★★★

Michael O'Sullivan was very helpful getting me out of my DUI. He got it dropped to reckless driving and helped along the whole way to make sure I was never confused on what was going on. He answered all my questions promptly and was very kind throughout the whole process. His service was also one of the cheapest I found. I would recommend him to anyone looking for an attorney.

Client

★★★★★

This lawyer got me off three very unjust but nonetheless hard to fight tickets twice!! He has my utmost respect and consideration!! I recommend him all the time whenever I come across anyone who has a problem!! Don't ever doubt to hire his services!!! Won't regret it!!

Client

Our company(Nuzzi Fuel) performed a service call for one of their properties last December and still has not paid the bill after numerous attempts. I spoke with Austin who has not rectified this situation. Do not do any work for this office unless you get paid upon completion!!!

Client

★★★★★

Dennis is friendly and professional. I thoroughly enjoyed my experiment with him and would recommend him to anyone. His staff is warm and friendly, and very knowledgeable. I am very pleased with the quality of service!

Client

★★★★★

I first came to Dennis back in 1990's. Excellent Law Office. The Professionalism of his Staff is Amazing. I would recommend Dennis J, O'Sullivan Law Office 100%.

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