A.J. de Bartolomeo > Tadler Law LLP > New York, United States > Lawyer Profile

Tadler Law LLP
NEW YORK 10119
United States

Work Department





A.J. de Bartolomeo is a shareholder of Tadler Law LLP, with nearly thirty years of experience prosecuting class actions, complex and collective matters in courts throughout the country. Ms. de Bartolomeo has earned a national reputation as a zealous and passionate advocate, “[S]he is not only extremely intelligent but is tireless in her representation of her clients and no one cares more about doing a great job for her clients than A.J.” 1 Because of her experience and character, Ms. de Bartolomeo has been appointed by Courts as Lead or Co-Lead Counsel, or as a Plaintiffs’ Steering Committee member in numerous MDL class action, mass torts and bankruptcy proceedings. She has also served on Law and Briefing committees and been involved with Daubert challenge briefings in a number of these cases. Ms. De Bartolomeo has been named among the highest class of attorneys for professional ethics and legal skills with an AV-Preeminent™ rating by Martindale Hubbell and has been recognized by her peers as a Northern California Super Lawyer every year since 2013.

Ms. de Bartolomeo is committed to advancing opportunities for women lawyers. She is the former Chair of the Women’s Trial Lawyer Caucus of the American Association of Justice (2015-2016), where she oversaw the caucus’s work in leadership training, student scholarship, membership and political outreach, and other pro-civil justice functions. She is an active member of the American Bar Association Sections on Tort Trial and Insurance Practice and the Consumer Attorneys of California. She is a former member of the American Bankruptcy Institute.

Ms. De Bartolomeo is frequently an invited speaker before industry organizations and public corporations on the subjects of ethical procedures for client and case management, best settlement practices and procedures in complex litigation and MDL practice, pharmaceutical fraud, Daubert challenges, Federal Rule 37, corporate litigation risk management and compliance procedures, and class action notice and settlement administration. She has also written articles on class action settlement procedures and best practices.


State Bar of California, December 1988 U.S. Supreme Court, February 2001
U.S. Court of Appeals
First Circuit, October 2003 Second Circuit, June 2006 Third Circuit, January 2018 Fifth Circuit, January 2004 Sixth Circuit, August 2008 Ninth Circuit, December 1988
U.S. District Courts Northern District of California, December 1988 Eastern District of California and Southern District of Texas, December 1993 Eastern District of Michigan, October 1994 Southern and Central Districts of California, December 1995 Eastern District of Wisconsin, February 2010


University of California, Hastings College of the Law, J.D. – 1988 Fairfield University, B.A. – 1982 London School of Economics, General Course Certificate in Economics – 1981

Lawyer Rankings

United States > Dispute resolution > E-discovery

Established in 2019, Tadler Law LLP, founded by the ‘super-smart, commercial, down-to-earth’ Ariana Tadler, approaches e-discovery work from the perspective of the plaintiff, rather than the defendant which is more typical of larger firms. The women-owned and operated litigation boutique, certified by Women’s Business Enterprise National Council in 2020, provides discovery expertise to individuals, corporations and other law firms and has had particular success representing clients in class-action litigation proceedings relating to data breaches. The New York-based Tadler co-leads the practice alongside San Francisco practitioner A.J. de Bartolomeo, who has a reputation for advising on MDL class actions, mass torts, and bankruptcy proceedings. In Denver, Brian Morrison handles consumer and product liability disputes.