About Andrew M.
Andrew M. Klaas is an Illinois lawyer who joined Petrelli Previtera, LLC in 2022. He practices in the Chicago legal community and is based at the firm’s office in Two Prudential Plaza. Klaas entered the firm as a lawyer and has since been involved in client representation and the day-to-day work that keeps a litigation practice moving.
Since joining Petrelli Previtera, LLC, Klaas has taken on responsibilities typical for an associate-level lawyer. He prepares pleadings, conducts factual and legal research, and assists in case development. He also supports trial preparation and coordinates with experts and co-counsel when matters require additional resources. His colleagues describe him as methodical in how he approaches file work and responsive to client and team needs.
Klaas maintains current membership in professional associations. He attends bar and association events to stay current on changes in law and procedure. Those activities, combined with regular continuing legal education, inform his handling of matters and help him align legal strategy with procedural requirements.
Petrelli Previtera, LLC operates from downtown offices at Two Prudential Plaza, where Klaas meets with clients and works with the firm’s litigation team. The office setting places him close to courts and administrative offices, which can be useful for filings, appearances, and client meetings. Within the firm he works alongside attorneys who manage complex civil matters, contributing to discovery, motion practice, and settlement efforts where applicable.
Outside the office, Klaas engages in professional development and maintains the contacts that help sustain a law practice in a metropolitan market. He has built experience through hands-on casework since joining the firm in 2022 and continues to expand his practical skills through active participation in firm matters and association programs.
He is in private practice at Petrelli Previtera, LLC, handling client matters out of the firm’s Two Prudential Plaza office.
