Leadership

Ariane Coldiron

Chief Executive Officer
LinkedIn
- Ariane.Coldiron@PRA.com
Ariane Coldiron serves as the Chief Executive Officer at PRA, bringing over three decades of leadership and expertise in corporate events, brand experience, and client development. Before joining PRA, Ariane held prominent executive roles at industry-leading organizations, including her most recent position as Senior Vice President, Corporate Events, at Production Resource Group, where she strengthened the company’s presence in the corporate events sector. During her tenure at Freeman, including her position as Senior Vice President, Brand Experience, she led account direction, spearheaded strategic initiatives, and collaborated with a diverse array of clients, from Fortune 500 companies to emerging market leaders.

Ariane's professional journey also includes influential roles at renowned agencies such as Jack Morton Worldwide and InVision Communications. Throughout her career, she has earned recognition as a thought leader in the industry, frequently sharing her insights at events like the Corporate Event Marketing Association (CEMA), powered by PCMA, and the Experience Marketing Summit (EMS), produced by Event Marketer magazine. Known for her results-driven leadership approach, Ariane fosters innovation and collaboration to deliver exceptional outcomes for clients.

Ariane, a graduate of both George Washington University and Mount Vernon College, holds dual bachelor’s degrees in International Relations and U.S. Public Policy.
Greg Myles

Chief Financial Officer
LinkedIn
- greg.myles@pra.com
Greg is an accomplished financial executive with a proven track record of leading companies to achieve financial growth. He is a strategic leader with a passion for quickly assessing performance drivers and working collaboratively to achieve organizational objectives.

Greg comes to PRA from InProduction, Inc. where he most recently served in the role of Chief Financial Officer. Prior to his role at InProduction, Greg worked across several industries, including hospitality, professional services and technology.

Greg has his MBA, Finance from DePaul University and undergraduate work from University of Cincinnati. He and his family reside in the Chicago area and he will work out of our Chicago office.
Laurie Knapp

Chief Growth Officer
LinkedIn
- Laurie.Knapp@PRA.com
Bringing 20 years of global sales leadership from the hospitality and business event management sectors to the organization, Laurie joined PRA in 2017 as the EVP of Global Sales and Marketing.

Laurie has extensive experience building, managing and leading high-performance sales teams in competitive markets.

Laurie earned a BS in Hotel Administration from the University of Nevada-Las Vegas.
Sara Talsma

Senior Vice President, People
LinkedIn
- Sara.Talsma@PRA.com
Coming to PRA in 2018 most recently from luxury design house HOLLY HUNT, Sara brought a rich understanding of the same type of entrepreneurial spirit, quality expectations and client focus upon which PRA has thrived through the years.

Sara earned an MA in Psychology from Northwestern University and completed her undergraduate course of study with a BS in Psychology, Sociology and Anthropology from Albion College.
Michael Costa

Senior Vice President, Business Operations
LinkedIn
- Michael.Costa@PRA.com
Michael brings more than twenty years of experience in executive management to the PRA team. In his role as Senior Vice President, Business Operations, Michael is responsible for developing and implementing business strategies to support company initiatives, while creating synergies and leverage opportunities throughout the PRA system.
Stan Dzierzega

Senior Vice President, Enterprise Project Management
LinkedIn
- stan.dzierzega@pra.com
Stan is a highly charismatic leader with over 20 years of operations leadership, supply chain development, and project management experience. Leveraging his Six Sigma Black Belt and accountability experience, he has focused on empowering teams for peak performance.

Prior to joining PRA, Stan held senior leadership positions across several industries, with a focus on process improvement and systems deployment. Stan has his degree in Operations Management and Information Systems from Northern Illinois University. He and his family reside in the Tampa Bay area and he will work out of our Chicago office.
Danielle Cirami-Gillis

Senior Vice President, Strategic Partnerships
LinkedIn
- danielle.gillis@pra.com
Danielle brings a strong management background to PRA with a proven track record in developing and executing corporate and brand identity initiatives within multiple business sectors. Most recently she served as Vice President, Events and Tradeshows for Northstar Travel Group, a leading B-to-B information and marketing solutions company, serving all segments of the travel industry. It was there she managed 20-plus global events, tradeshows and meetings to introduce business strategies, new product segments and additional sponsorship revenue growth drivers. She also participated in merger and acquisitions through new event, talent and channel partner programs.

In this role, Cirami-Gillis will activate PRA strategic partnerships across all PRA service and solution platforms with a primary focus on aggressively forming and expanding hotel partnerships across the markets PRA serves. She will operate as a sales leader, building on strategic relationships that contribute to the overall PRA growth plan, while developing approaches that ensure strategic advancement of key partners.
Melanie Hohman

Vice President, Production Services
LinkedIn
- Melanie.Hohman@PRA.com
Melanie is a strategic production executive with more than 20 years’ experience leading large-scale, integrated events for global technology and enterprise brands. In her current role, she delivers innovative live, virtual and hybrid experiences that support business goals.

She’s held leadership positions at George P. Johnson, Intel and Freeman, where she oversaw event production, team development and operational infrastructure. Her client portfolio includes Google, Toyota, PepsiCo and GE, with a focus on cost efficiency, scalability and cross-departmental collaboration.

Melanie’s strengths lie in strategic planning, content-rich brand experiences and global event execution. She’s known for building high-performing teams, driving operational excellence and delivering results through data-led insights.

Outside work, Melanie enjoys gardening, baking and exploring new travel destinations.You can call her Mel!
Tom Kemp

Chairman
LinkedIn
- tom.kemp@pra.com
Tom Kemp is a seasoned executive and private equity investor with extensive experience in business-to-business information, events, and media. He has led the growth of Northstar into a leading global travel industry company, providing information, marketing solutions, and e-commerce services.

In 2008, he founded Oakstreet Media to invest in lower-middle market B2B media and information companies. Previously, Tom was Managing Director at Veronis Suhler Stevenson, Chairman and CEO of Penton Media, and President and COO of Miller Freeman Inc. Over his career, he has completed and integrated over 100 transactions, with experience in public company leadership and financing.

Tom serves on the board of SISO and has held board positions with other industry associations. He has received numerous honors, including induction into the B-to-B Media Hall of Fame in 2023. Tom holds a BA with honors from Amherst College and lives in Mill Valley, California.

Best Event $200,000 and under

PRA earned top honors at ADMEI’s Achievement Awards for Best Event, recognized for bold creativity, flawless execution, and exceptional destination management.

Best Event with a Social Responsibility or Inclusivity Component

The Allie Awards honored PRA in the Best Corporate Event category, celebrating excellence in Georgia’s live events industry while supporting scholarships and professional growth.

List of America’s Fastest-Growing Private Companies

PRA earned a coveted spot on Inc. magazine’s prestigious Inc. 5000 list, celebrating the nation’s fastest-growing private companies and standout innovators in the event management industry.

Site Crystal Awards

Known as the highest honor in incentive travel, PRA proudly received the SITE Crystal Award, recognized for delivering unforgettable programs that inspire teams, boost engagement, and drive powerful business results.

Top 25 DMC Spotlight

PRA, once again was named a top DMC by Special Events Magazine, honoring our deep destination expertise, trusted local partnerships, and decades of delivering authentic, immersive experiences for business events worldwide.

Best DMC

For nine consecutive years, PRA has earned the prestigious title of Best DMC by Stella Award honoring our excellence, innovation, and trusted service in delivering impactful, world-class events across North America.

Hall of Leaders

PRA Founder Patti Roscoe was inducted into the EIC Hall of Leaders, celebrating her visionary leadership, trailblazing impact, and generous contributions that helped shape and elevate the global events industry.

Smart Women in Meetings

Kristi Cline earned the Smart Women in Meetings Visionary Award for bold leadership, inventive strategy, and redefining luxury events with future-focused creativity that inspires unforgettable experiences and industry innovation.

Special Events Magazine

PRA Production rocked the Top 50 list from Special Events Magazine—recognized for dazzling global event magic, creative chops, and trendsetting vibes that keep us (and our clients) ahead of the curve.

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Ariane Coldiron

Greg Myles

Laurie Knapp

Sara Talsma

Michael Costa

Stan Dzierzega

Danielle Cirami-Gillis

Melanie Hohman

Tom Kemp

Awards & Recognitions

Best Event $200,000 and under

Best Event with a Social Responsibility or Inclusivity Component

List of America’s Fastest-Growing Private Companies

Site Crystal Awards

Top 25 DMC Spotlight

Best DMC

Hall of Leaders

Smart Women in Meetings

Special Events Magazine

Where Next Begins

PRA Mourns the Passing of Dean Altvater

Go Plastic Free in July

Ready to Create What’s Next?

Let's Connect

Be an insider

Leadership

Ariane Coldiron

Greg Myles

Laurie Knapp

Sara Talsma

Michael Costa

Stan Dzierzega

Danielle Cirami-Gillis

Melanie Hohman

Tom Kemp

Awards & Recognitions

Best Event $200,000 and under

Best Event with a Social Responsibility or Inclusivity Component

List of America’s Fastest-Growing Private Companies

Site Crystal Awards

Top 25 DMC Spotlight

Best DMC

Hall of Leaders

Smart Women in Meetings

Special Events Magazine

Latest News

Where Next Begins

Where Next Begins

PRA Mourns the Passing of Dean Altvater

PRA Mourns the Passing of Dean Altvater

Go Plastic Free in July

Go Plastic Free in July

Ready to Create What’s Next?

Smart Women in Meetings