Our Legal Staff

The People Who Are Our Firm

Gary W. Johnson was the founder of the Firm and a principal of the Firm.

Gary W. Johnson founded what is now Johnson, Langworthy & Muchnik, P.C. Mr. Johnson had graduated from Richmond College on Staten Island and Pace University School of Law after having served in the U.S. Army as a combat soldier in Vietnam. After school and his service in the Army, he returned to his home community to practice law.

After practicing several years in general practice and real estate matters, Mr. Johnson began concentrating in the area of Elder Law, particularly planning for seniors who might need nursing home care or in-home health care services. He helped many Staten Island and Brooklyn families and single people obtain services in their elder years. He was active in the Alzheimer’s Foundation of Staten Island, Inc. and served on the Board of Directors of the Community Agency for Senior Citizens. Interested in local government, he was a founding member of Staten Island Vote Yes, Inc., a grassroots organization advocating for self-government for Staten Island.

In 1987, the Firm expanded to also offer services in Estate Planning, Estate and Trust Administration and Business Planning. The Firm formally changed its name to Johnson, Langworthy & Muchnik, P.C. in 2002.

Gary W. Johnson

Gary W. Johnson

Founder & Principal

Leslie M. Langworthy

Leslie M. Langworthy


Leslie M. Langworthy is a partner of the Firm and practices in the areas of Estate Planning, Estate and Trust administration and settlement and Elder Law.

Ms. Langworthy graduated Colgate University in Hamilton, New York and Albany Law School of Union University in Albany, New York.

After admission to the Bar, she worked as a Law Assistant to the Honorable Robert Best, County Judge and Surrogate in Fulton County, New York. Thereafter, she worked as a Trust Officer for Manufacturers Hanover Bank and the Bank of New York.

She joined the legal staff of the Bank of New York and concentrated on credit facilities and Bank regulatory matters. She then became an Associate Attorney for Carella, Byrne, Bain & Gilfillan in Roseland, New Jersey. While there, she handled acquisitions and divestitures for an investment company and provided counsel to an investment advisory Firm.

In 1990, Ms. Langworthy began practicing law in her hometown, Staten Island, New York of Counsel and later a partner of Johnson, Langworthy & Muchnik, P.C. concentrating on Estate Planning, Trust and Estate Settlement and general Corporate Practice.

She was a member of the Board of Directors of the Alzheimer’s Association, the Staten Island Children’s Museum and the Friends of Blue Heron Park. She co-founded Staten Island Vote Yes, Inc., a grass roots organization advocating for self-government for Staten Island. She also served as Treasurer to the Staten Island Herb Society and served on the Board of the International Herb Association.

Ms. Langworthy resides on Staten Island and enjoys gardening, time spent in the Adirondacks, New York and writing about growing and using herbs.

Kirill Muchnik is a partner of the Firm and concentrates in Elder Law, Special Needs Planning, Guardianship, Estate Planning, and Estate Administration. Mr. Muchnik grew up in Brooklyn, NY, arriving with his family to the United States in 1992 from the Ukraine. He is fluent in the Russian language and conversational in Ukrainian. After receiving a Bachelor of Business Administration from Baruch College in 2009, with a major in Finance and Investments, Mr. Muchnik worked as a financial services representative for MetLife where he developed knowledge of insurance and investment products. Mr. Muchnik’s passion to help guide individuals through the legal and financial challenges is the force that propelled his decision to enter law school. During his studies at Albany Law School, he interned at The Ayco Company, L.P., A Goldman Sachs Company, assisting financial advisors with providing investment services, retirement and tax planning.

With experience in both insurance sales and wealth management, Mr. Muchnik brings to Johnson, Langworthy & Muchnik, P.C. an understanding of complex issues that can arise in both Estate Planning and Administration.

Mr. Muchnik received his Juris Doctorate from Albany Law School in 2014 and was admitted to the Bar of the State of New York and the State of New Jersey in 2015. He is a member of the New York State Bar Association, the Richmond County Bar Association, the New Jersey State Bar Association and the American Bar Association.

Kirill Muchnik

Kirill Muchnik


Tracey Marino is a Paralegal of the Firm and Office Manager. After receiving an Associate’s Degree in Secretarial Studies from Katherine Gibbs School in 1990, Mrs. Marino worked as an Executive Legal Assistant for large law Firms in Manhattan specializing in corporate law and real estate. With over 25 years of law Firm experience, Mrs. Marino brings to Johnson, Langworthy & Muchnik, P.C. her expertise in real estate transactions and experience in providing lawyers with direct assistance, such as helping to prepare the necessary documents for cases and submission of paperwork to courthouses.

Mrs. Marino is an active Girl Scouts of Greater New York Troop Leader and participates in community service events with her Troop who have been together for seven years. She is also the Vice President of the Tottenville Wrestling Parents’ Club tournaments, fundraising events as well as obtaining grants for the team. Mrs. Marino resides on Staten Island with her family.

Tracey Marino

Office Manager and Paralegal


The mission of Johnson, Langworthy & Muchnik, P.C. is to inform and counsel clients on their rights under the law and to protect those rights with vigor, dedication and integrity.

The real assets of our Firm are not law texts, desks or computers— they’re the people whose faces appear throughout, they are our legal staff. They are people who have been chosen not only for their legal experience and professional skills, but because they enjoy working with our clients one-to-one.

Whether on our legal or support staffs, as individuals and as a team they understand that clients and their families are people, not cases. They are committed to the highest professional and ethical standards.

We help you gain the greatest benefit!