James P. O'Brien

Matthew H. Giger is a co-founder of Rosenberg, Giger & Perala PC and an attorney based in New York, New York, with more than twenty years of litigation experience. He represents clients in a broad range of litigation, dispute resolution, and advisory matters. His practice includes Entertainment Law – Music, with a substantial focus on copyright disputes and litigation arising within the music and entertainment industries, as well as matters involving trademark, commercial, real esta...

Florence Richardson is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Florence, who practices law in Latham, New York, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Florence is held by other top lawyers in the same geographic and legal practice area.

Kenneth R. Larywon is a senior partner and trial attorney, focusing his practice on the defense of professional liability cases and healthcare law matters. For over 30 years, Mr. Larywon has defended physicians and hospitals in claims arising out of the delivery of medical care. He has also represented healthcare professionals in disciplinary proceedings before the Office of Professional Medical Conduct and the Department of Education. Mr. Larywon has extensive experience in counseling and de...

Elizabeth E. Erickson is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Elizabeth E., who practices law in New York, New York, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Elizabeth E. is held by other top lawyers in the same geographic and legal practice area.

Brian W. Kniesly is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Brian W., who practices law in New York, New York, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Brian W. is held by other top lawyers in the same geographic and legal practice area.

Christopher M. Valentino is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management, Labor Law - Management and Litigation - Labor and Employment. Christopher M., who practices law in Melville, New York, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christopher M. is held by other top lawyers in the same geographic and legal practice area.

Eric W. Penzer is a trust and estate litigator representing high-net-worth individuals and families. Eric is a trusted advisor for clients involved in complex challenges related to generational wealth and asset transfer. As an experienced trial lawyer, Eric provides strategic representation in contested probate proceedings, fiduciary accounting disputes, discovery and turnover proceedings, and other trust and estate matters. He is known for being responsive, fair, and committed to achieving f...

Harry S. Davis is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Harry S., who practices law in New York, New York, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Harry S. is held by other top lawyers in the same geographic and legal practice area.

Harris E. Markhoff is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Trusts and Estates. Harris E., who practices law in White Plains, New York, has been recognized since 1989. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Harris E. is held by other top lawyers in the same geographic and legal practice area.

Mark L. Stulmaker practices in the areas of employee benefits and taxation, serving as counsel to trustees of public and private pension and health and welfare benefit plans as well as to closely held businesses. He is also involved in estate planning and administration, especially in connection with charitable trusts, foundations, and large retirement plan distributions. Practice Areas Employee Benefits Tax Resources Mark Stulmaker is distinguished by the depth of his experience and knowledg...