About Michael S.
Michael S. Siddall built his legal foundation at the University of Wisconsin–Oshkosh, earning a B.A. in 1972, and then at Drake University Law School, where he received his J.D. in 1974. He entered practice the same year and has worked in Wisconsin courts for decades. His early academic years set the stage for a long career in trial work.
He joined Herrling Clark Law Office Ltd. in 1974 and has been associated with the firm since then. Over time his work remained rooted in courtroom practice. He is admitted to practice in Wisconsin and has maintained a steady presence in the state’s legal community. The length of his service at a single firm gives a measure of continuity to his career.
Siddall holds professional certifications from the National Board of Trial Advocacy. He is a certified Civil Trial Advocate and a Civil Pre-trial Advocacy Specialist. Those credentials signal specific training and examination in courtroom and pre-trial techniques. They align with the kinds of matters he has handled over the years.
He has been active in professional organizations. He has been a member of the American Association for Justice since 1981. Within Wisconsin he has served as a Regional Director and as a member of the Executive Committee for both the Wisconsin Association for Justice and the Wisconsin Academy of Trial Lawyers. Those roles involve participation in governance and in shaping regional programming for trial practitioners.
His practice is based in multiple Herrling Clark offices across northeastern Wisconsin. He has worked out of the firm’s Oshkosh office and has also been associated with the Green Bay and Appleton offices. That geographic reach allows him to appear in venues across the region and to remain connected to a range of local courts and lawyers.
Clients and colleagues most often see him in trial or pre-trial settings. He carries board certifications that relate directly to those phases of litigation. He remains active in professional groups that center on trial advocacy and legal education.
As of 2026 he continues to practice at Herrling Clark Law Office Ltd., maintaining an emphasis on civil trial and pre-trial advocacy in Wisconsin.
