an event and communication agency
can a live event
really advance business goals?
One Smooth Stone is an event and communication agency, which means we’ve spent more than 20 years crafting and delivering events to help organizations like yours achieve strategic objectives. By producing in-person and online events, incentive programs, and communication strategies, we’ve helped hundreds of companies build beliefs and behaviors critical to achieving their business goals.

We Serve as Audience Advocates

We see the entire experience from the perspective of your audience, ensuring it exceeds their expectations and builds your brand.

We Deliver Business Solutions

We create experiences focused on achieving your business objectives, such as improved sales and workforce change.

We Lead as Trusted Guides

We navigate the challenging terrain of events and communications, earning your trust through expertise, integrity and kindness.

One Smooth Stone’s insight and direction is integral to our event strategy and execution.  They ‘get us’ – they understand the needs, wants and dynamics of our all-female audience; they guide our thinking concerning the role of our events within our business strategy; and they share our passion for doing things the right way and with heart.

Chief Executive Officer, cabi

In our wildest dreams, we would not have dared to think that our new partner would be so vastly superior to our previous partner; the production so surprisingly fresh, the quality of the production team so top rate, the execution so crisp, the direction so articulate.

Director, Conference Planning & Procurement, Follett Higher Education

It was a pleasure working with each member of the OSS team every step of the way.   Everyone was not only smart, fast and kind… but also, each was a true professional, in every sense of the word. It was clear that you would bring our general session program to a new level of professional excellence: true business theater. So, the bar has been raised!

Director, Health Plan Institute, Kaiser Permanente

Hiring One Smooth Stone proved to be the best choice we could have made. The entire experience from pre-planning, to preparation to execution and event follow up was flawless. Our partners said it was the best event they had ever been to and they couldn’t wait for next year.

Business Development Manager, Oracle

on time. on budget. on target.
(choose three)
Much has changed in the 20+ years that we’ve been designing and delivering live and online events. With a portfolio spanning over 30 countries, our perspective has grown more global. By leveraging current technology and digital savvy, we help you stay relevant. But what hasn’t changed since our inception is equally important: We still apply strong visual storytelling skills that transform events into theater and breathe life into your communications.
we like our clients. we like our work.
we even like each other.
If you ask our clients what it’s like to work with us (and we hope you do!) you’re likely to hear some simple truths. Values like honesty, respect and kindness define the way we interact with each other, our clients and our vendors. Ours is a creative environment in which assumptions are challenged with respect, questions are freely asked, discussion is open and listening is foundational. We practice humility, integrity and accountability in serving our clients and each other.

we deliver exceptional results
because we have exceptional people.

If producing results in the face of impossible deadlines and overwhelming circumstances was easy, we wouldn’t need the professionals we have. But two decades of leadership in this industry have taught us that challenges inevitably arise. Every client relationship involves one of our owners, and our events are produced by senior executives. As a team, we enjoy turning our experience and professionalism into our clients’ confidence and success.

Gary Vlk

Executive Vice President and Principal

Gary Vlk

As a founding principal of One Smooth Stone, Gary brings foresight into the changing needs of clients that has allowed the agency to evolve from simply producing meetings to addressing organizations’ marketing challenges and leading them from strategy through execution.

As a musician (yes, he had 80s hair-band hair), Gary is attuned to the rhythms and arrangements inherent in all meetings and events, especially during the planning process. This background gives him the rare ability to lead logistically and technically complex programs, while also remaining a calming influence on those around him.

A recipient of an Ex Award from Event Marketing Magazine for best corporate virtual event, Gary regularly shares his ideas on the One Smooth Stone blog, whether discussing the power of the Grammy Awards or the branding of James Bond. Get to know Gary better on LinkedIn.

Stephanie Selig

Producer

Stephanie Selig

With a wide range of event experience, Stephanie has been an invaluable part of our team for more than 15 years. She joined One Smooth Stone right from Columbia College. Growing up here has equipped her with the tools necessary to deliver impact and exceed client expectations.

Stephanie’s ability to easily grasp a project, blend seamlessly into any team, and efficiently multi-task makes her a favorite internally and among our clients. Her positive attitude and effortless flexibility enables her to quickly assess a situation and create powerful solutions in the most stressful environments. And if you ask her, she will tell you the birthday of every person who has ever worked here. Get to know Stephanie better on LinkedIn.

Mark Ledogar

Senior Vice President and Principal

Mark Ledogar

Mark joined One Smooth Stone in 2000, coming over from SmithBucklin, where he was director of the tradeshow division.

Mark’s hands-on approach to strategic and creative message development, pre-event and on-site event production, presenter management and coaching, and team leadership positions Mark as a highly skilled and highly invested relationship manager for the variety of clients we serve.

And spirit of giving back serves as a model for us all. He’s the president of the Northwestern University Alumni Association and president of Seven Generations Ahead, a non-profit sustainable community organization. Get to know Mark better on LinkedIn.

Juliann Kelley

Associate Producer

Juliann Kelley

Juliann joined the One Smooth Stone family in 2012. Since joining our team, she has quickly exceled. The daughter of a meeting planner, Juliann inherited the key traits necessary for success. She’s detail oriented, proactive, creative, and personable. Juliann brings her creative, calm and solutions-oriented approach to solve any problem, big or small, during both the planning process and onsite event. Get to know Juliann better on LinkedIn.

Steve Koppel

Vice President

Steve Koppel

Steve joined One Smooth Stone in 1999, coming over from Edelman Public Relations, where he provided internal communication counsel to Fortune 100 companies.

During his tenure, he’s produced events in more than a dozen countries for organizations big and small. Steve loves the adventure of producing something from scratch. He says every client and every event is unique. “Whether it’s a ballroom filled with thousands of people, or a barrel room filled with wine, I love figuring out what’s possible.”

Steve’s not your typical event producer. His background in public relations and marketing has allowed him to provide value to message development and event communication strategies.

Steve shares his ideas regularly on the One Smooth Stone blog, where he discusses topics ranging from the state of the art in trade show booth design to improving your speaking skills. Get to know Steve better on LinkedIn.

Brian Duffy

Vice President, Business Development

Brian Duffy

Brian leads our sales efforts. Coming to us from BI, he quickly shored up our sales process. Competitive wins for work with US Cellular, United Airlines, and OfficeMax have his fingerprints all over them. He lives in Denver, but he grew up in Jersey, so he traded the salt air for no air. Get to know Brian better on LinkedIn.

Barb Sepulveda

Senior Administrative Coordinator

Barb Sepulveda

Barb takes care of all of us Stonies. Among other things, she coordinates our travel, manages our shipping, and keeps the kitchen stocked! For nearly 10 years, she’s run a tight ship over here, giving us the support we need to produce exceptional programs for our clients. Get to know Barb better on LinkedIn.

Kevin Olsen

President and Principal

Kevin Olsen

In an industry full of visionaries, Kevin Olsen has few equals. He has worked in the meetings and events industry for several years. Long ago, Kevin learned that success isn't measured strictly by an effective event outcome -- but also by forming relationships with loyal clients and partners. In 1995, this vision led him to establish One Smooth Stone, his ultimate creative endeavor.

Throughout the last 20 years, Kevin has created an event and communications agency that consistently achieves impact for its clients and provides a home for Stonies who are allowed to be the same people they are at home as in the office -- and who live our culture of being smart, fast, and kind.

Drawing on knowledge gleaned from diverse industries, Kevin generates innovative ideas and pushes his clients to achieve greatness. The former president of the MPI Foundation, he also shares his thinking regularly on the One Smooth Stone blog, whether discussing the art of audience advocacy or the power of branding. Get to know Kevin better on LinkedIn.

Jonathan Williams

Project Coordinator

Jonathan Williams

Jonathan came to One Smooth Stone from McDonald’s, where he produced events for more than seven years. Jonathan's music and theater background make him a natural in the live event industry. He’s a skilled media producer as well, and if you have any questions about Star Wars, Star Trek or Dr. Who, go no further. Get to know Jonathan better on LinkedIn.

Ken Haller

Vice President

Ken Haller

Prior to joining One Smooth Stone in 2002, Ken was vice president and director of production for Thinktank, an integrated marketing agency in Chicago. Throughout his nearly 30-year career, Ken has worked in broadcast television and radio, has worked with three presidents and produced and planned events in 30 countries.

A jack of all trades (and a master of a few, too), he possesses expertise that is as diverse as his background: global sales kick-offs, large incentive programs, countless press events, and the Summer Olympics. Today, he focuses his passion on working with clients to solve their communications needs through innovative and integrated event solutions. Ken has a deep footing with most traditional and non-traditional media and enjoys investigating diverse tools and solutions that best fit a client’s objectives. Get to know Ken better on LinkedIn.

Lisa Hultmark

Senior Administrative Coordinator

Lisa Hultmark

Lisa works in our accounting department. The mother of five kids and nearly a dozen foreign exchange students through the years, she knows how to balance a budget.

Brad Zulke

Chief Operating Officer and Principal

Brad joined One Smooth Stone after 15 years of leading a $400 million investment management & trust company in the greater Chicago area. As the CEO, he created short- and long-term strategic initiatives, as well as the actionable plans to achieve the company's objectives. His strengths include strategic planning, financial management and leadership.

At One Smooth Stone, Brad runs our vast business empire. He’s our COO/CFO and is responsible for the daily operational and financial management of One Smooth Stone. Get to know Brad better on LinkedIn.

one smooth stone

5222 Main Street
Downers Grove, IL 60515 USA
+1.630.427.4226

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