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Mark J. Jahnke

A long-time client describes Mark as “the kind of lawyer that every CEO dreams of hiring,” and the lawyer he would want on his side of the table in any negotiation.

Ask Mark Jahnke how he's doing, and he will tell you he's living the dream. And while every attorney knows on some days that might ring sarcastic, Mark regularly means it.

For him, the dream is the opportunity to work with clients to help them achieve their dreams. Because clients recognize that his level of care and concern is something unique, Mark is often asked to serve on client boards, advisory groups or in other capacities that allow him to work hand-in-hand with management to achieve business goals or navigate challenges and complexities.

While day-to-day client counseling frequently occupies a portion of Mark's workday, his reputation has been built on and staked to the special skill he brings to advising clients on mergers, acquisitions, divestitures and other major corporate transactions. Several times Mark has represented one party in a deal only to be hired later by the other party in connection with a separate transaction.

A long-time client describes Mark as “the kind of lawyer that every CEO dreams of hiring,” and the lawyer he would want on his side of the table in any negotiation. As that client recognized, Mark does not pretend to be an expert in every area, but involves the right people as needed to help clients avoid unnecessary legal adventures. This echoes Mark’s recognition in Chambers USA as an “astute business lawyer and negotiator who is very easy to deal with,” and who will "fight for the things that are important with great practical judgment and a sense of humor.”

From 2000-September 2020, Mark was the President and CEO of Katz Teller. Mark’s ability to bring out the best in those around him, along with his leadership and judgment, help to keep us focused on achieving the level of service our clients expect and deserve.

Awards and Honors

  • Listed as one of the Best Lawyers in America® for Corporate Law and Mergers & Acquisitions every year since 1999
  • Named “Lawyer of the Year” for Cincinnati in Corporate Law for 2012, 2014, 2017 & 2021 and Mergers and Acquisitions Law for 2012 & 2015 by Woodward/White’s Best Lawyers in America®
  • Listed in Chambers USA – America’s Leading Lawyers for Business for Corporate/Mergers and Acquisitions
  • Received the Neil H. McElroy Award from the United Way of Greater Cincinnati in 2008 for Resource Development Leadership
  • Received the Deal Maker of the Year Award in 2007 from the Association for Corporate Growth
  • Named an M&A Client Service All-Star by The BTI Consulting Group, Inc.

In addition to handling a variety of matters relating to business organizations, including owner/shareholder relationships, business succession and related issues, and representation of C-level private and public company executives, Mark has represented a number of our clients, including those identified below, in significant acquisition, recapitalization and disposition transactions:

Community Involvement

Bar Admissions


Mark J. Jahnke

Contact info


Sondra Leach
T (513) 977-3466