Leslie graduated cum laude with a J.D. from Seton Hall University School of Law in New Jersey. In Year 3 at Seton Hall, Leslie was elected as Editor-in-Chief of the Seton Hall Legislative Journal, which position involved supervision of a 40-person student editorial staff and the desk-top publishing of two Journal volumes. Leslie also graduated magna cum laude with a B.A. in English from Montclair State University.

Leslie is a seasoned commercial litigator with extensive trial and motion experience and has appeared in nearly all New Jersey courts. She has practiced in a wide variety of commercial litigation fields, including mortgage and tax lien foreclosure, consumer collections, community association collections, evictions, and consumer defense litigation. Leslie also has administrative state law and municipal regulatory experience. She relocated to Las Vegas from New Jersey in September 2023.


  • J.D., cum laude, Seton Hall University School of Law, June 1995
  • Editor-in-Chief, Seton Hall Legislative Journal – 1994 to 1995
  • Member, Seton Hall Legislative Journal staff – 1993 to 1994
  • B.A. in English, magna cum laude, Montclair State University, June 1992
  • New Jersey – December 1995 (current status: active)
  • Pennsylvania – November 1995 (current status: retired)
  • Member, New Jersey State Bar Association
  • Insurance Bad Faith Defense
  • Insurance Coverage
  • Premises Liability Defense
  • Community Association Law & Collections
  • Commercial Litigation
  • Corporate Contracts and Transactions
  • Corporate Counsel and Formation
  • Real Estate Litigation and Transactions
  • Creditor’s Rights
  • Mortgage and Tax Lien Foreclosure (Fair Foreclosure Act, Consumer Fraud Act, Fair Debt Collections Practices Act)
  • Land Use and Municipal Law
  • Administrative/State Regulatory Law
  • Consumer Defense Litigation - Legal Services Attorney
  • Consumer Debt Collections
  • Plaintiffs’ Landlord/Tenant Litigation
  • Defended 'Big 6' Banks in predatory lending lawsuits between 2008 and 2012
  • Represented 200+ homeowners’ associations in collection litigation against unit owners, recovering over $750,000 in unpaid community association fees
  • Avoided over $500,000 in judgments against indigent consumer borrowers
  • Represented nationwide credit card companies, major Atlantic City casinos, large hospitals and physicians in collection matters, recovering over $750,000 in unpaid consumer debts
  • Leslie L. Mangini: To Help or Not to Help: Assisted Suicide and its Moral, Ethical, and Legal Ramifications, 18 Seton Hall Legis. J. 728 (1994)