Polk County Member, Admissions Committee, 1990-1995, Iowa State Member, Committee on American Citizenship, 1990— and American Bar Associations American Board of Trial Advocates Trial Lawyers for Public Justice The Association of Trial Lawyers of Am

Polk County, Iowa State Member, Litigation and Workers Compensation Sections and American Bar Associations Defense Research and Trial Lawyers Association Iowa Association of Workers Compensation Lawyers Iowa Defense Counsel Association.

Polk County, Iowa State and American Bar Associations The Missouri Bar Defense Research Institute Iowa Trial Lawyers Association Iowa Defense Counsel Association National Association of Railroad Trial Counsel.

Polk County Member, Board of Directors, 2002—, Iowa State and American Bar Associations The District of Columbia Bar Iowa Trial Lawyers Association.

Nebraska State, Iowa State and American Bar Associations.

Polk County, Iowa State, Kansas and American Bar Associations The Missouri Bar.

The District of Columbia Bar Maryland State Bar Association.

Polk County, Iowa State and American Bar Associations Association of Trial Lawyers of Iowa The Association of Trial Lawyers of America.