Matthew Costello

Matthew Costello represents employers across a wide range of industries in complex employment litigation and advises companies on emerging issues involving artificial intelligence in the workplace. His litigation practice includes class actions, PAGA claims, and disputes involving allegations of discrimination, harassment, retaliation, trade secret misappropriation, and breach of contract.

A growing focus of Matthew’s practice is helping employers navigate the rapidly evolving legal landscape surrounding artificial intelligence. He counsels employers on AI legislation and regulation in the United States and internationally, helping organizations understand emerging requirements and translate them into practical compliance strategies. His work includes advising on AI governance and risk management, bias audits, acceptable use policies, AI guardrails, and department-specific guidelines. He also reviews AI algorithms, prompts, tools, and use cases for legal risk and develops governance frameworks to help companies respond to new AI developments and provide practical guidance to their workforces and business teams.