Justin T. Mannino

Partner Justin Mannino represents individuals and businesses in the areas of federal, state, and local taxation; multigenerational estate planning; numerous business and corporate governance and ownership matters; successions; and trusts.

Justin works with individuals and families to prepare estate plans and implement wills, powers of attorney, and to establish trust instruments [grantor trusts, multigenerational trusts, and grantor retained annuity trusts (GRATs)]. He also advises clients regarding the structure of multi-generational wealth conservation plans to effectively access the exemptions for the gift, estate, and generation-skipping transfer taxes and to transfer intra-family wealth with minimal transfer tax cost and without disruption of business operations. He also handles will contests and disputes, the implementation of wealth conservation plans, and the administration of estates and trusts. Justin offers advice to executors in executing his or her duties as administrator and properly administering complex estates. Justin frequently presents at CLE seminars on the topics of estate planning, successions, and federal taxation. Justin is a member of the Baton Rouge Estate and Business Planning Council.

Mr. Mannino regularly advises clients concerning business and personal financial transactions, including developing the tax structure for sales, mergers or acquisitions of businesses, and drafting buy-sell agreements, asset or stock purchase agreements, operating agreements, or other corporate governance instruments. He provides business planning for closely held corporations and provides tax advice for matters from formation to liquidation.

In 2025, Justin was elected as a fellow to The American College of Trust and Estate Counsel (ACTEC), an organization of trust and estate lawyers and law professors in the United States and around the world. Fellows of the ACTEC are considered leading members of the Trust and Estate profession who have made substantial contribution to the Trust and Estate field.

Justin is ranked by his peers among the Best Lawyers in America “Ones to Watch” and Louisiana Super Lawyers “Rising Stars.” Justin was a member of the Louisiana State Bar Association Leadership Class of 2016-2017. He is an active member of both the Louisiana State and Baton Rouge Bar Associations. Justin has been a member of the Louisiana State Bar Association Ethics Committee since 2017. Mr. Mannino was elected as one of the Louisiana State Bar Association’s Top 40 Young Lawyers in Louisiana in 2025 and is a member of the 2025 Baton Rouge Area Chamber (BRAC) Leadership Class.

Justin received his J.D./D.C.L., cum laude, from Louisiana State University Paul M. Hebert Law Center in 2013. During this time, Justin served as the SBA Executive President and as the student member of the LSU Board of Supervisors (2012-2013). After law school, Justin continued his legal education at the University of Florida Levin College of Law, where he graduated with a Master of Laws (LL.M.) in Taxation in 2014. Justin also received a B.S in 2010 from the Louisiana State University E.J. Ourso College of Business.

Justin is currently a member of the Board of Directors for Baton Rouge Green and WRKF.

• Lead counsel for the asset sale of a pest control business valued at approximately $25 million.
• Representing buyers in the asset sale of a veterinary business.
• Representing various business owners, including closely held businesses, in evaluating the best tax structure for sale or purchase of businesses.
• Handling large-scale federal and state tax controversies with the Internal Revenue Service and Louisiana Department of Revenue.
• Representing clients in the formation of 501(c)(3) charitable organizations and foundations, including application for tax exempt status with the IRS, and providing advice to nonprofit entities on formation, corporate governance, tax exemption, and compliance with tax-exempt law.
• Representing businesses in corporate matters and mergers and acquisitions, in particular a multimillion-dollar merger of a fumigation company which had footholds nationally with a publicly traded corporation.

• University of Florida Levin College of Law, LL.M., Taxation, 2014
• Louisiana State University Paul M. Hebert Law Center, J.D./D.C.L., 2013
• Louisiana State University, B.S., 2010

• Louisiana

• Baton Rouge Bar Association
• Louisiana State Bar Association
• Estate & Business Planning Council of Baton Rouge
• Louisiana State Bar Association Leadership Class (2016-2017)
• Louisiana State Bar Association Ethics Committee (2017-Present)
• The American College of Trust and Estate Counsel (ACTEC)
• Baton Rouge Area Chamber (BRAC) Leadership Class (2025)

• AV Peer Review Rated by Martindale-Hubbell
• Best Lawyers in America – “Ones to Watch”- Tax Law, Trusts and Estates
• Louisiana Super Lawyers – “Rising Star” – Estate Planning & Probate
• LSBA Top 40 Young Lawyers in Louisiana

• “Donative and Testamentary Capacity and Litigation,” LSU Law’s 54th Annual Estate Planning Conference CLE, October 2024

• Catholic High School Alumni Association (Board of Directors, 2017-2023)
• St. Aloysius Catholic Church (Worship Committee Chair, 2019 – Present)
• Baton Rouge Green (Board of Directors)
• WRKF (Board of Directors)