O'NEIL - Key Persons


Britany E. Morrison

Job Titles:
  • Attorney
  • Member of the Education Committee
  • Member of the Business Law, Mergers and Acquisitions
Britany is a member of the Business Law, Mergers and Acquisitions, Tax Advice, Planning, and Controversy, and Estate & Succession Planning Practice Groups where she focuses on helping clients effectively manage one of their most significant costs-taxes-by advising clients on a variety of federal, state and local, private wealth, employee benefit, real estate, tax-exempt and controversy tax matters. By utilizing her former experience as a certified public accountant, she understands the numbers as well as the legalities associated with the various tax issues our clients face and approaches issues at every angle to help further our client's overall individual and business objectives.

Carl D. Holborn

Job Titles:
  • Member of the Education Committee
  • Trusted Advisor
Whether he is working with clients to create and administer an estate plan, solving complicated business problems, negotiating with the IRS, or helping to transition a family owned business to the next generation, Carl prides himself on being a trusted advisor to his clients. With a Master's Degree in Taxation, Carl possesses unique skills to assist his clients in solving legal issues in a tax efficient manner. A clear thinker and easy to talk to, Carl distills complex legal issues into understandable ones that allow his clients to make effective decisions. Carl's clients are individuals and businesses in a wide variety of occupations and industries that value a trusted advisor as their lawyer.

Chad J. Richter - Shareholder

Job Titles:
  • Attorney
  • Member of the Education Committee
  • Shareholder
Chad is a shareholder and member of the firm's Business Law Practice Group. His practice focuses on working with privately held businesses and their owners, acting as corporate counsel to help them with the various legal issues they face in operating and expanding their businesses.

Christa D. Wittenberg

Job Titles:
  • Member of the Education Committee
Christa is a commercial litigator with a focus on business relationships that break down. She also serves on the firm's Board of Directors. With attention to detail, Christa especially enjoys tackling challenging procedural issues and working with large sets of data. Whether her client's goal is to fight to win or resolve a dispute through settlement, Christa works hard for the best possible result for her client, relying on her good judgment and experience to give honest and practical advice.

Christa Wittenberg Wins

Job Titles:
  • Attorney

Claude J. Krawczyk

Job Titles:
  • Attorney
  • Member of the Education Committee

Dean P. Laing

Job Titles:
  • Dean
  • Member of the Education Committee
Dean P. Laing has been with O'Neil, Cannon, Hollman, DeJong & Laing S.C., a 40-plus attorney law firm headquartered in Milwaukee, Wisconsin, for over 40 years since graduating cum laude from Marquette University Law School in 1983. He was on the firm's Board of Directors from 1990 to 2023, and was the firm's President from 2015 to 2020. Mr. Laing is board certified in Civil Trial Advocacy and Civil Pretrial Practice Advocacy by the National Board of Trial Advocacy, and is a frequent author and speaker on legal issues involving evidence, torts, insurance, and trial tactics. He has authored 42 journal articles and book chapters, including the Evidence Chapter of the Wisconsin State Bar's annual book entitled Annual Survey of Wisconsin Law each year (but two) from 1987 to 2016; been an invited speaker at 33 legal seminars/workshops; and been counsel in more than 70 published/reported decisions, many of which made new law. Mr. Laing's personality and trial skills have allowed him to be one of a select few attorneys who have been able to successfully practice both commercial litigation and personal injury litigation. In addition to representing Fortune 500 and other variously sized companies in their commercial litigation needs, Mr. Laing represents severely injured persons in prosecuting their personal injury claims. His passion for those cases is partially derived from his having two brothers with cerebral palsy. As a result of growing up in that environment, Mr. Laing understands what families go through in caring for loved ones with special needs, and is able to communicate that to insurance companies, defense counsel, judges, and juries.

Dennis Hollman

Job Titles:
  • Presents at the Society of Financial Service Professionals in Tampa

Dennis Hollman Presents

Job Titles:
  • Presents at the Society of Financial Service Professionals in Tampa

Dennis W. Hollman

Job Titles:
  • Member of the Education Committee

Douglas P. Dehler - Shareholder

Job Titles:
  • Member of the Education Committee
  • Shareholder
Doug Dehler is a shareholder with the law firm of O'Neil, Cannon, Hollman, DeJong & Laing S.C., where he leads the firm's Class Action and False Claims Act practice group. Mr. Dehler's practice focuses primarily on high-stakes, complex litigation, including class action lawsuits and whistleblower (qui tam) cases. Mr. Dehler also represents healthcare providers and business clients in insurance matters, including disputes with health insurance companies and managed care payors. Mr. Dehler has been regularly included in Wisconsin Super Lawyers based on his class action experience, and also has been included in The Best Lawyers in America® based on his insurance litigation experience. He has served on the Legal Assistance Committee, a standing committee of the Wisconsin State Bar Association. He also serves as a board member for the Friends of the Remington Center at the University of Wisconsin Law School.

Emily M. Behn

Job Titles:
  • Attorney
  • Member of the Education Committee
  • Member of the Firm
Emily is a member of the firm's Litigation Practice Group. Emily provides guidance on a wide variety of both personal and commercial litigation matters ranging from inheritance and contract disputes to business shareholder disputes, property disputes, and renovation and construction disputes. As a natural storyteller, Emily always knows the facts, pays attention to the details and most importantly, knows how to communicate complex ideas in a way that makes sense. She leaves no box unchecked when advocating for her clients. Prior to law school, Emily studied journalism and worked in public relations telling the stories of both public and private sector clients in the health care, food and beverage, agriculture, and gaming industries. She now leverages her communications experience in her legal advocacy.

Eric M. Peterson

Job Titles:
  • Associate
  • Member of the Education Committee
  • Estate Planning Attorney
As an Estate Planning attorney, Eric's primary focus is to help clients prepare for the future and ensure that their loved ones are taken care of. Eric specializes in creating comprehensive estate plans that cover all aspects of asset protection, inheritance, and end-of-life planning. Whether you are a business owner looking to protect your assets, a parent seeking to provide for your children's future, or someone who wants to leave a legacy, Eric will guide you through the entire estate planning process. At the end of the day, Eric's goal is to provide peace of mind and security to his clients and their loved ones, both now and in the future.

Erica N. Reib

Job Titles:
  • Member of the Education Committee

Grant C. Killoran

Job Titles:
  • Attorney
  • Member of the Education Committee
  • Appointed Co - Chair of the Wisconsin Fellows of the American Bar Foundation

Grant Killoran - Shareholder

Job Titles:
  • Attorney
  • Shareholder
  • Fellow of the Wisconsin Law Foundation
  • Life Fellow of the American Bar Foundation
  • Member of the American Bar Association 's Board of Governors
  • Milwaukee Bar Association Appoints Attorney
Grant is a Life Fellow of the American Bar Foundation, membership in which is limited to one-third of one percent of the lawyers in America Grant is a Fellow of the Wisconsin Law Foundation, membership in which is limited to 2.5% of the members of the State Bar of Wisconsin Grant has been selected as one of the "Midwest's Top Rated Lawyers" in litigation and health care law and a "Top Rated Litigator" by American Lawyer Media and Martindale-Hubbell® Grant has been named a Wisconsin "Super Lawyer" by Super Lawyers Magazine and Milwaukee Magazine, a distinction limited to the top 5% of Wisconsin attorneys Grant has been named one of Milwaukee's "Leading Lawyers" by M Magazine, in conjunction with Avvo, in the areas of health care law and litigation Grant has been named to the "Irish Legal 100" as a leading figure in law across the U.S. by The Irish Voice Newspaper 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 practice areas of Commercial Litigation and Litigation-Health Care. He has an AV-Preeminent Peer Review Rating™ with Martindale-Hubbell®, which "reflects an attorney who has reached the heights of professional excellence, has usually practiced law for many years and is recognized for the highest levels of skill and integrity." He has a 10.0 out of 10.0 rating by Avvo, a national attorney rating service which uses a mathematical model to rate attorneys based on experience, professional achievements, industry recognition and professional conduct. Grant is a member of the American Bar Association's Board of Governors and the ABA House of Delegates. He is a Life Fellow of the American Bar Foundation and a Fellow of the Wisconsin Law Foundation. He is the Co-Chair of the American Bar Foundation for the State of Wisconsin.

Gregory W. Lyons

Job Titles:
  • Attorney
  • Member of the Education Committee
Greg Lyons is Honored as Attorney of the Year by the Top 100 Registry

James G. DeJong

Job Titles:
  • Attorney
  • Member of the Education Committee
Attorney Jim DeJong was featured in an article appearing in the 2013 Summer Edition of the Marquette Lawyer Magaz ine. Read the article about Jim here.

JB Koenings

Job Titles:
  • Member of the Education Committee
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.

Jean M. Ansay


Joseph E. O'Neill

Job Titles:
  • Student Writing, 2011

Kelly S. Kuglitsch

Job Titles:
  • Dean P. Laing

Lex Mundi

Job Titles:
  • North American Regional Vice - Chair

Marquette Pro Bono Society

Job Titles:
  • Member With Distinction

O'Neil Cannon

Job Titles:
  • Legal Advisor to Diamond Vogel, Inc. in Acquisition of Subsidiary of the Sherwin - Williams Company
  • Legal Advisor to Engendren Corporation in Its Sale to Cummins Inc.
  • Legal Advisor to Guetzke & Associates in Its Sale to Ryan Fireprotection, Inc.
  • Legal Advisor to I3 Product Development in Its Sale to Helios Technologies
O'Neil, Cannon is Pleased to Announce That Attorney Douglas Dehler Has Joined the Firm

Seth E. Dizard


Thomas E. Fairchild

Job Titles:
  • Barrister

Will Contests

Job Titles:
  • Trust & Estate Litigation