Mark G. Arnzen, Jr.

Joe Callow leads litigation matters on a national, regional, and local basis. Joe works primarily on complex litigation. He has experience in class actions/collective actions and multi-district litigation, as well as environmental, securities, IP, antitrust, and commercial litigation. Joe currently represents several state Attorneys General in complex litigation. Joe was one of the lead litigation counsel for the State of Ohio in its litigation against opioid distributors that resulted in an ...

Joseph P. Mellen is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Joseph P., who practices law in Cincinnati, Ohio, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joseph P. is held by other top lawyers in the same geographic and legal practice area.

Ross D. Taylor is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Finance Law. Ross D., who practices law in Cincinnati, Ohio, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ross D. is held by other top lawyers in the same geographic and legal practice area.

Mark Sims practices in the business representation & transactions practice group and works primarily in the federal income tax, business planning and healthcare areas. Mark's federal tax practice involves individual, corporate, S corporation and partnership tax planning, including executive compensation and like kind exchanges. He advises clients regarding the tax aspects of mergers and acquisitions. Mark also represents clients on matters before the IRS and state tax agencies. Additional...

Dan Demmerle is a seasoned Cincinnati business attorney with decades of experience advising corporations, family-owned businesses, and privately held entities across Ohio and Northern Kentucky. His practice spans general business law, real estate transactions, commercial financing, and development matters. Dan is particularly well known for his long-standing work in the hospitality industry, with over 40 years representing hotel owners and operators in management and franchise agreements, acq...

Ted Grosser grew up working in a family business so it was only natural that he would end up at a firm that prides itself on representing such businesses. After practicing for more than 35 years at large firms in Cincinnati, Ted joined Katz Teller in 2013, bringing with him the tireless work ethic and relentless pursuit of the best outcome for his clients that has been his hallmark. Like the construction, manufacturing and service industry clients that rely on him for corporate counsel, Ted&r...

Step into Bob Pitcairn’s office, and you will be greeted by classical music, an uncluttered desk, and a sense of calm not normally associated with litigation (or a litigator’s office). But make no mistake, the business litigation Bob performs with surgical precision often has the highest stakes for his corporate and individual clients. Just as a surgeon would, Bob operates in these cases with a studied approach, a deliberate pace, a steady hand, and no fear of getting a little blo...

Robert R. Sparks is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Robert R., who practices law in Cincinnati, Ohio, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert R. is held by other top lawyers in the same geographic and legal practice area.

Patrick J. Beirne is a top attorney recognized by Best Lawyers in the practice area(s) of Medical Malpractice Law - Plaintiffs. Patrick J., who practices law in Covington, Kentucky, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Patrick J. is held by other top lawyers in the same geographic and legal practice area.

Rick Siegel is currently involved primarily in a general corporate and transactional practice, including mergers and acquisitions, commercial finance and counseling small and mid size clients of the firm. He has extensive experience in areas of mergers and acquisitions, commercial finance, commercial law and general corporate representation of small to mid size public and private companies, including leasing companies. His commercial finance practice concentrates primarily in the areas of lea...