Executive Bios


Jonathan Ullman is Executive Director and CEO of The Mob Museum, the National Museum of Organized Crime and Law Enforcement. Reporting to a 20-member Board of Directors, Jonathan is responsible for leading the organization that has been named both a “Top Workplace” and “Best Museum” by the Las Vegas Review-Journal and called one of “Ten Places American Should See” by the Huffington Post.

Jonathan has spent over 20 years in a variety of management and leadership roles within the nonprofit industry. Jonathan’s museum career began at Liberty Science Center, New Jersey’s most visited museum, where he was intimately involved in the strategic planning and operationalizing of the facility following a $109 million capital expansion. Over the years, Jonathan served in numerous capacities with responsibilities including intensive staff, program oversight and external relations. Immediately prior to joining The Mob Museum, Jonathan was the president and COO at the National Soccer Hall of Fame where he led the dramatic transformation of the organization’s operating model.

Jonathan earned his Bachelor’s Degree from Rutgers College and his Masters of Business Administration from Rutgers Business School. A believer in the importance of community, Jonathan has volunteered on a number of nonprofit boards and community-driven initiatives. He is a graduating member of the FBI Citizens’ Academy as well as LV Metro Police Department Citizens’ Academy. Jonathan serves as Vice President of the Executive Committee of the Downtown Las Vegas Alliance. Additionally he is a graduate of the Las Vegas Metro Chamber of Commerce’s Leadership Las Vegas Class program and a current member of its Leadership Council.


Mark B. Achenbach is responsible for the Human Resources function and provides oversight to accounting and information technology for The Mob Museum. He is a practicing attorney, licensed in New Jersey and New York. Prior to joining The Mob Museum, Achenbach managed a solo-practice law firm, which remains active in New Jersey. He earned his JD from the Rutgers School of Law – Newark, and his BS from West Virginia University. Before entering law school, Achenbach’s concentration was on the human resources field, principally in the nonprofit sector, including a 4-year tenure at Liberty Science Center.


Michael A. Dagenais is responsible for the cross-departmental collaboration that ensures continuous improvements in all aspects of the guest experience at The Mob Museum. In this capacity, Dagenais has direct oversight of all staff members who operate the public spaces, including the box office and exhibit floors. Prior to joining The Mob Museum, Dagenais served as guest services manager for the Springs Preserve in Las Vegas where he was a part of the team that built and opened the Preserve. He was also assistant general manager for Rawhide Western Town in Scottsdale, AZ; director of operations for Wet ‘n Wild Water Park in Las Vegas and director of operations for Sea World in San Diego, CA. Dagenais has a Master of Arts with emphasis on museum studies and a Bachelor of Arts in economics from the University of California, San Diego.


Kimberly Kindig is responsible for the cultivation of memberships and sponsorships, development of donor opportunities, and formation of effective relationships that enhance the organization’s standing in the community and its overall financial growth. As the former Executive Director for the Solutions Foundation and Director of Senior Programs for Catholic Charities, Kimberly, a Las Vegas native, has a robust background in resource development and fundraising within the non-profit sector. She received her Master’s degree in Nonprofit/NGO Leadership from the University of Pennsylvania and her Bachelor’s degree in Political Science from Vanderbilt University.


Ashley Miller is responsible for developing and implementing marketing strategies to include advertising, media planning, promotions, internet marketing, database marketing and market research for The Mob Museum.  Most recently, she worked as director of communications for a real estate investment start-up focused on alternative financing and merchandising mixes authentic to the local area. Previously, she was public relations and marketing manager for Loews Hotels, a luxury hospitality company that operates 24 hotels in the U.S. and Canada. Miller is a graduate of the University of Nevada, Las Vegas, with a bachelor’s degree in communication studies with an emphasis on public relations and advertising. An active alumna of UNLV, she is a member of the Alumni Events committee as well as a board chair for the College of Urban Affairs Alumni.


After a 25-year career in journalism, Geoff Schumacher is the director of content for The Mob Museum in Las Vegas. A graduate of the University of Nevada, Reno, Schumacher started his career at the Las Vegas Sun, where he was a reporter, editorial writer and city editor over a 10-year period. He was editor of Las Vegas CityLife and founded and edited the Las Vegas Mercury. He served as director of community publications for the Las Vegas Review-Journal for 10 years and also wrote a weekly public affairs column for the Review-Journal. He culminated his newspaper career by serving as publisher of the Ames (Iowa) Tribune. Schumacher is the author of two books, Sun, Sin & Suburbia: A History of Modern Las Vegas and Howard Hughes: Power, Paranoia & Palace Intrigue. He served as editor of Nevada: 150 Years in the Silver State, the official book commemorating the state’s sesquicentennial.


Sabine von Henning is the primary sales advocate for The Mob Museum. Her responsibilities include the planning of special events and facility rentals as well as individual and group ticket sales. A native of Berlin, Germany, Sabine has many years of sales and event management experience in the international tourism industry. She earned a degree in hospitality management and a degree in commercial law with a concentration in sales and marketing. Before making Las Vegas her home she lived and worked in various European and North African countries as well as the Caribbean adding Spanish, French and Italian to her native German language. Most recently, she worked as director of sales and marketing for a local destination management company.