Chief Executive Officer
Chief Executive Officer Scott Brennan leads Lexicon and guides the organization's transformation into a world-class technology and services provider.
With his diverse, global business leadership background, Mr. Brennan is driving Lexicon's strategy with a relentless focus on superior customer experience.
Before leading the Lexicon team, Mr. Brennan served as President and Chief Growth Officer of RoomIt by Carlson Wagonlit Travel (CWT). While there, he envisioned and led a multi-billion-dollar hotel distribution startup. Mr. Brennan was also the Executive Vice President and head of global supplier management for CWT. He was instrumental in the growth and eventual sale of Rocketmiles to Booking.com and has held senior leadership positions with companies such as GE and Hilton.
Mr. Brennan received his Bachelor of Science degree in industrial engineering from the State University of New York at Buffalo and his Master of Business Administration from the University of Chicago Booth School of Business.
Chief Financial Officer and Chief Operating Officer
Tom Boster is the Chief Financial And Operating Officer of Lexicon. He is responsible for directing and managing the company’s finance and accounting operations and oversees ongoing business operations.
A holder of Certified Public Accountant certificate and a Chartered Global Management Accountant with over 25 years of industry experience, Mr. Boster’s strong operations and project management skills are focused on software solutions, budgeting, and overall performance improvement, payor relations, and revenue cycle optimization.
Mr. Boster has a history of supporting and growing legal services. As the Chief Administrative Officer, he established the firm’s long term strategic plan and led the merger of multiple firms and new practice groups into HeplerBroom LLC. Additionally, he oversaw the Operations, Finance, Human Resources, IT, Accounting, Revenue Cycle, and Property Management functions of the firm.
As the Chief of Operations and Finance of the Mercy Cancer Care, a top-ranking cancer care facility in St. Louis, MO, he was responsible for operational and financial management and negotiated the sale and the successful transition from Mercy Cancer Care to the Mercy Health System.
Mr. Boster received his Bachelor of Arts degree in accountancy from Blackburn College in Carlinville, IL. and is Six Sigma Green Belt certified.
Chief Marketing Officer
Steve Short is Chief Marketing Officer of Lexicon and oversees the marketing, sales, and data science teams. He is responsible for all aspects of Lexicon’s marketing and sales efforts, including strategy, customer research, digital, traditional marketing, public relations, communications, and account management. Mr. Short also ensures that the data science team transforms insights into meaningful information to support decision-making that maximizes returns. His keen ability to remain current in marketing and industry advancements, emerging technology, and customer trends allows him to lead the growing presence of Lexicon in the marketplace.
Throughout his extensive career, Mr. Short has provided strong leadership to his teams to identify and build profitable strategic accounts and sustainable partnerships. Before joining Lexicon, he had a 28-year tenure with Enterprise Holdings, a highly successful $26B company based in St. Louis, MO. He held numerous senior leadership roles at Enterprise, which included his management of an Officer team and international business development sales force. Mr. Short oversaw the negotiations, creation, marketing, growth, sponsorships, cost reduction, and development of a diverse portfolio of strategic partnership accounts, including numerous Fortune 100 companies.
Mr. Short received a degree from the University of Southern California’s Marshall School of Business with an emphasis in marketing and finance. He serves on the board of directors for The Torch Relay for Children’s Miracle Network Hospitals and Junior Achievement of Greater St. Louis.
Chief Information Officer
As Chief Information Officer of Lexicon, Brad Paubel oversees operations within Lexicon’s IT infrastructure, services, project management, and development organizations.
Mr. Paubel is an Information Technology Infrastructure Library (ITIL) expert with over 20 years of experience working in IT operations. He has a proven track record of developing service offerings while reducing costs through strategic team development and culture transformation.
He was previously employed in St. Louis, MO, by Maritz, a 1.2-billion-dollar technology company that offers corporate travel, employee incentives, market research, and brand development. Mr. Paubel held the roles of Vice President of Infrastructure Services and Vice President of Internal Customer Technologies. In these capacities, he led the initiative to design a comprehensive enterprise-wide technology strategy. Mr. Paubel is skilled at identifying process gaps, increasing security, and service offerings through strategy-driven solutions.
As business becomes more complex and technology becomes more transparent, organizations must invest in technology to drive strategic initiatives. Mr. Paubel strongly believes in the alignment of IT teams with the Lexicon customer to ensure that the company develops and implements strategies that address evolving needs while building relationships that ease the business’s state of mind.