Leadership Team

John Bax is a finance and operations executive with more than 20 years of experience in a diverse range of technology-enabled and professional services organizations, including the world’s largest company, Wal-Mart. As Chief Financial Officer for OneSource Virtual, he is responsible for overseeing the company’s accounting and finance activities, from capital structure to forecasting, planning and preparing the corporate and financial infrastructure that will ensure continued growth.

A longtime CFO of private equity and venture capital-backed technology businesses, John has scaled three separate startups to more than $1 billion in annual revenues, raised more than $3 billion in capital in the private markets, performed more than 40 M&A transactions, and managed finance and accounting teams from 6 to 300.

Prior to joining OneSource Virtual, John served as CFO for Rubicon Global, NJOY, LivingSocial, Recyclebank and Sentient Flight Group. At LivingSocial, he was also in charge of all international operations, with operations in 24 countries across six continents, and more than $1 billion of annual turnover reporting to John. He also served as VP planning & analysis for Wal-Mart Stores, where he was responsible for strategic planning. Prior to that, he was CFO of their Walmart.com unit. John brings deep professional services as experience to his role as well, having reached the senior manager ranks with Ernst & Young.

John earned his Bachelor of Science and MBA from Oklahoma State University. John and his family live in Atlanta, Georgia. In his downtime, John volunteers as treasurer of Walton Youth Football and Cheer.

As the chief revenue officer at OneSource Virtual, Courtny is dedicated to building a global, customer-centric organization. His leadership spans all aspects of revenue generation and go-to-market strategy, including business development, marketing, strategic alliances, vertical markets, and revenue operations. Courtny's unwavering commitment to technology-enabled services and his drive to deliver exceptional customer value are a testament to his dedication to growth and innovation.

Prior to joining OneSource Virtual, Courtny was the chief revenue officer at Asurint, a leading technology company specializing in pre-employment screening. His 30-plus-year career also includes senior leadership positions at Mercer, Ceridian, Korn Ferry, and Boise Cascade, where he was responsible for marketing, sales, alliances, and client retention, with a particular focus on SaaS technology and business process outsourcing.

Outside of his professional pursuits, Courtny and his wife, Tiffany, are actively involved in charitable endeavors and enjoy spending time with their two daughters.

Courtny has a degree in business administration from the University of Nebraska.

As OneSource Virtual’s Chief Technology Officer, Joe Disharoon combines a strong leadership background with a passion for implementing innovative solutions, all with the goal of deploying technology that empowers OSV’s employees and its customers.

In his nearly 30 years of experience, Joe has a proven track record of guiding large business units to double-digit growth and has deployed advanced technology solutions as a business partner with more than 50 Fortune 500 companies.

Prior to joining One Source Virtual, Joe was the Chief Technology Officer for Kobie Marketing and the Senior Vice President of Technology for Epsilon. He has also held technology roles with Halliburton and Secor.

When he’s not working, Joe enjoys woodworking, swimming, and fishing. He lives in the Tampa Bay area with his wife and two children.

As OneSource Virtual’s Chief Operating Officer, Michael Roseman oversees the BPaaS and Application Management Services teams, helping drive consistency and innovation across OneSource Virtual’s three service pillars. Michael has proven experience leading teams in nearly every branch of OSV, making him uniquely qualified to act as this single point of accountability for the services OSV offers its customers.

Before assuming his current role in 2018, Michael served OSV as senior vice president of customer operations and senior vice president of finance and accounting outsourcing. He began at OSV as vice president of professional services, where he focused on reliable, efficient services that maximized customers’ Workday investments.

In addition to his many years with OSV, he has also held executive leadership positions at Astadia, Inc. and Marketing Advocate, LLC.

Michael holds a BA in history from Emory University, an MBA from the University of Texas at Austin and a graduate certificate in Mandarin from the Chinese University of Hong Kong.

As Senior Vice President of Sales, Brian Levey brings over 12 years of experience to managing OSV's North American sales organization. With an emphasis on delivering value, Brian and his team are committed to optimizing Workday for both customers and prospects.

Brian joined OneSource Virtual in 2013 as an Inside Sales Account Manager. Because of his customer-centric approach, his reputation as a strong performer, and his managerial and creative capabilities, he rose quickly within the Sales team, serving in multiple leadership positions before assuming the SVP role in 2022. Brian leads by example, ensuring that customers and prospects receive the highest quality of service and support.

A graduate of the University of New Hampshire, Brian achieved Regional All-American honors as a soccer player before competing professionally from 2008 to 2012. He lives in North Richland Hills, a suburb of Fort Worth, Texas. Outside of work, his passions include golf, cars, and playing guitar.

Lauren Lund brings a wealth of expertise to her role as OSV’s Senior Vice President of Marketing, with 15 years of specialized, hands-on experience in enterprise marketing, account-based marketing, and Workday, plus a track record of consistently surpassing targets to deliver outstanding results.

Before joining OSV, she spent seven years with Workday’s marketing team, eventually becoming their Senior Director of North American Marketing. From there, she served as the Senior Director of Enterprise Marketing for Coursera and the Vice President of Marketing for Particle.

In her spare time, Lauren enjoys running, reading, traveling, skiing, golfing, and cherishing moments with those who bring joy and laughter into her life. She lives in Minnesota with her partner, her four stepchildren, and two dogs.

Jane Huston brings more than two decades of experience to her role as SVP of Human Resources for OneSource Virtual. 

As a key member of OSV’s leadership team, she’s committed to continuously strengthening the company’s employee programs and workplace culture to effectively attract, retain and reward top talent while maintaining OSV’s reputation as a great place to work. 

Prior to joining OSV, Jane spent more than a decade with Epsilon Data Management, serving in a variety of roles that included SVP of Human Resources and chief people officer. She has also worked for Grant Thornton LLP and Ernst & Young Consulting. In 2016, the Dallas Business Journal named Jane a “Women in Business Honoree” for her years of excellence in leadership. 

Outside of work, Jane stays very involved with Girls Inc., an organization dedicated to providing underserved girls ages 6-18 with the life-changing skills they need for success in school and in their careers. She is a reluctant jogger, but she thoroughly enjoys old movies and reading. Jane lives with her family in Dallas.

Kelvin Gray has been an essential member of OneSource Virtual since 2009, bringing with him 20 years of extensive experience in information technology and management. He uses this experience and passion for customers to help them receive maximum value from their solutions. Throughout his time with the organization, he has held multiple roles, including Director of Field Operations, Vice President of Solutions Sales and SVP of Customer Accounts.

Before coming to OneSource Virtual, Kelvin gained valuable experience through his work with Workday, PeopleSoft and Oracle.

Kelvin holds a BA in computer science from Morehouse College and an MS in information technology from Northwestern University. When he’s not splitting time between OSV HQ in Dallas and wherever he’s needed by customers and his team, Kelvin calls Chicago home.

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Erin Clark joined OneSource Virtual in 2019 as Assistant General Counsel before moving into the role of General Counsel in 2020. With more than 30 years of corporate and litigation experience on her resume, she leverages her broad legal background every day in service to OSV.  

Before coming on board, she served as senior corporate counsel for Huawei Device USA, Inc. She also served in multiple senior counsel positions for Hewlett Packard and Electronic Data Systems.  

Born and raised in Dallas, Erin earned her Doctor of Jurisprudence from the Texas Tech School of Law and, together with her husband, has three kids, one grandkid, four cats, and one dog. When she’s not working, she volunteers with Court Appointed Special Advocates (CASA) as an advocate for children removed from their families by CPS. She also enjoys singing, hiking, and biking. 

Carl Madaffari brings over 30 years of experience in technology and product management to his role as the SVP of Product Management at OSV. He started his career at IBM before spending two decades at Epsilon/Publicis, where he held roles in data management, product management, and marketing.

Before launching his career, Carl studied computer science at the University of North Texas.

His experience and dynamic leadership capabilities will contribute to OSV's continued success, while his integration into the OSV team demonstrates the company's commitment to driving growth and excellence.

Outside of work, Carl cherishes spending time with his family and pets. His interests range from travel to photography, music, and maintaining an active lifestyle.