He has extensive experience navigating high-stakes matters involving whistleblower complaints and alleged regulatory violations, fraud, and business misconduct. Jack works closely with clients to uncover critical facts and develop robust, technical, and cost-effective strategies tailored to their unique needs.

In addition to his white-collar work, Jack counsels clients on regulatory matters involving the Federal Food, Drug, and Cosmetic Act (FFDCA), the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) (particularly regarding antimicrobial pesticides and devices), and the Toxic Substances Control Act (TSCA), often working at the intersections of these overlapping regulatory schemes. He also counsels clients on developing nature-based carbon offset programs and navigating the evolving U.S. regulation of organic agriculture, industrial hemp and cannabis, and cell- and plant-based alternatives to traditional animal products. In 2025, "Best Lawyers: Ones To Watch" recognized Jack for his regulatory work.

During law school, Jack served for two years on the Board of Student Advisers and was an Article Editor for the Environmental Law Review. He co-directed the Food Law Society and contributed to research on legislative and policy issues through Harvard’s Food Law & Policy Clinic. His legal career builds on a diverse background that includes experience as a political campaign media consultant, a farmer, and a high school history and English teacher.

Jack maintains an active pro bono practice, supporting environmentally conscious businesses and non-profits and representing individuals seeking asylum, experiencing domestic violence, or facing possible eviction. He received High Honors Recognition on the Capital Pro Bono Honor Roll from 2021 to 2023.