David W. Clark

Grant Killoran is a shareholder at O’Neil Cannon and the Past Chair of its Litigation Practice Group. He has significant and diverse trial experience representing clients in Wisconsin State and Federal Courts, and courts around the country, focusing on complex business, health care and employment law disputes. Grant also devotes a portion of his practice to arts and entertainment law, with an emphasis on the music industry. Grant is listed in The Best Lawyers in America® in the prac...

Randal J. Brotherhood has more than thirty years of experience representing businesses and their owners in a wide variety of industries and settings. He also devotes a substantial part of his practice to representing tax-exempt organizations, foundations and trade associations of all types and sizes, ranging from local charitable organizations to large national and international membership associations. Randy represents business clients both on a day-to-day general counsel basis and as a stra...

Dave Roettgers is a Shareholder focusing his practice on the purchase and sale of businesses, taxation, corporate finance and business law. He is a Certified Public Accountant and uses his prior experience at Arthur Andersen LLP where he provided tax planning and business advice for individual and business clients. Representative Matters and Experience Representation of families and owners in all types of business planning including the transition of the business to the next generation, finan...

Jonathan T. Swain is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Labor Law - Management. Jonathan T., who practices law in Milwaukee, Wisconsin, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jonathan T. is held by other top lawyers in the same geographic and legal practice area.

Laurie A. Petersen is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Labor Law - Management. Laurie A., who practices law in Milwaukee, Wisconsin, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Laurie A. is held by other top lawyers in the same geographic and legal practice area.

JB leads O’Neil Cannon’s Business Law Practice Group and is a United States Air Force Veteran. He works with and advises clients on a wide range of business law matters, including form of entity selection and initial capitalization, raising funds through private equity offerings, securities compliance and broker/dealer matters, mergers and acquisitions, contract preparation and negotiation, and software, technology, and IP matters. JB Assists Clients With Mergers, acquisitions, an...

David G. Hanson is a top attorney recognized by Best Lawyers in the practice area(s) of Advertising Law, Litigation - ERISA, Litigation - Intellectual Property and Litigation - Patent. David G., who practices law in Milwaukee, Wisconsin, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David G. is held by other top lawyers in the same geographic and legal practice area.

Kristen S. Scheuerman is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Kristen S., who practices law in Mequon, Wisconsin, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kristen S. is held by other top lawyers in the same geographic and legal practice area.

Scott is a member of the firm’s Board of Directors, serves as Managing Shareholder of the Metro-Milwaukee offices, and chaired the Corporate and Business Law Team for eight years. He has been named a leading Wisconsin business transactions and corporate attorney by Law & Politics and Milwaukee Magazine for multiple years. Scott represents a wide variety of businesses and their owners, senior management, investors and lenders in mergers and acquisitions, divestitures, business succes...

John Sikora is a Shareholder representing clients in tax planning, tax controversies and the buying and selling of businesses and real estate with a particular focus on corporate, partnership and other business matters. John is an adjunct professor of law at Marquette University Law School, where he has taught the tax practice and procedure and corporate income tax courses. John has also taught the taxation of partnerships and S corporations course to graduate accounting degree candidates at ...