Our Attorneys
We are Growing
Diederich Law Team
Donald Mallo, of counsel
Employment Law
Donald graduated from Queens College with a degree in History and Political Science. Subsequently, he attended the Maurice A. Deane School of Law at Hofstra University and graduated with his law degree in 1974. Donald has over four decades of experience, with much of that time spent serving as General Counsel and Chief Human Resources Executive for Fortune 500 companies in the food, service, PEO, and manufacturing sectors.
Donald is passionate about using all he learned in the corporate sector to expertly defend individuals against major companies. Don is an experienced mediator and labor negotiator, having negotiated hundreds of national and international labor agreements.
Vanessa Castellino, of counsel
Employment Law
Vanessa graduated from Fordham University with a degree in History and Political Science. Subsequently, she attended Brooklyn Law School and graduated with her law degree in 2012. Vanessa has held various Extern and Fellow positions across New York City and State, including stints with The Solicitor's Office at the US Department of Labor, the NYPD Legal Bureau, and the Equal Employment Opportunity Commission's Hearings Department. Vanessa is a methodical researcher and writer, and has represented clients before the New York Supreme Court.
Vanessa has an expert understanding of Human Rights Law, Civil Procedure, and Employment Discrimination Law. Furthermore, she is licensed to practice in New Jersey in addition to New York.
Joseph Canepa, of counsel
Employment & Immigration Law
Joe graduated from Cathedral College of Immaculate Conception with a Philosophy degree. Then, he attended Georgetown for his Masters Degree and received his law degree from Brooklyn Law School in 1987. Joe works out of New York City, and he has spent over 30 years building a comprehensive general practice handling real estate, bankruptcy, matrimonial, trademark, and immigration law. Joe is licensed to practice across New York State. He is also admitted to the United States District Court Eastern District and Southern District of New York, as well as a member of the United States Supreme Court Bar.
Joe is bilingual and skilled in negotiation, legal writing, trials, domain registration, branding and mergers & acquisitions.
Michael Wolf, of counsel
Employment Law
Mike Wolf graduated from the University at Buffalo School of Law last year. In law school, Mike focused on criminal and family law, joining the Criminal Justice Advocacy Clinic and staying on post-graduation as a research fellow.
Longterm, he plans to practice these specialities alongside his parents, Cheryl Berzer and Paul Wolf, as well as employment and civil rights law. For the time being, you will find him assisting our affiliate attorneys across the state.
Affiliated Firms
Berzer & Wolf
Attorneys at Law
716-633-1400
Western New York
Berzer & Wolf is a full-service, family-run law firm based in Williamsville, NY. The firm has over 40 years of accumulated experience practicing across New York State.
Paul Wolf, Esq.
Diederich Affiliate
Paul Wolf graduated from Buffalo State in 1986 and received his law degree from Suny at Buffalo in 1991. Paul has legal expertise in various areas including criminal cases, estates and wills, business law, worker's compensation, and personal injury. You can view Paul's profile and client testimonials on AVVO.
Cheryl Berzer, Esq.
Diederich Affiliate
Cheryl Berzer graduated from the State University of New York at Buffalo in 1995 and received her law degree from University of Buffalo in 1998. is an experienced full-service attorney with a particular interest in matrimonial and family law. You can view Cheryl's profile and client testimonials on AVVO.
Diederich Employment Law Firm
Our Credentials
Bar Admissions:
New York State Bar Association
Massachusetts State Bar Association
American Bar Association
United States Supreme Court Bar Association
United States Second Circuit
Federal District Court
Professional Associations and Memberships:
National Employment Lawyers Association (NELA)
New York State Bar Association
Rockland County Bar Association
Orange County Bar Association
The Glory of a Good Lawyer
Is to Win a Bad Trial.
( Balzac)
Firm Victory 01.
Client Testimonial
"Thank you to Diederich Law for successfully guiding me through my legal process. I appreciate your legal advice and expertise. May this practice have continued success!"
-Daphne, September 2023