Our leadership team

David Grace is an accomplished travel industry veteran with more than two decades of experience leading strategic and management teams for Enterprise Holdings and National Car Rental, and most recently, Deem, Inc. Having been an integral part of the 2019 acquisition of Deem by Enterprise Holdings and then signing on as Deem’s Chief Revenue Officer (CRO), Grace was named President at Deem in November 2020. Grace began his career at National Car Rental and quickly moved into leadership roles, including Vice President of Sales and Vice President of Strategic Accounts, where he led nationwide sales. He later transitioned into executive roles at Enterprise Holdings and, currently, at Deem. Grace is a global travel and mobility thought leader, and a well-known industry speaker. He frequently presents at live and virtual events around the world for industry organizations including Business Travel News and GBTA, and is quoted regularly in trade publications.

Christina is a passionate global traveler who has devoted her career to leading sales and client management teams in the business travel industry. As Deem’s Chief Revenue Officer, she is accelerating the company’s global growth through new customer acquisition, strategic partnerships, and customer retention and expansion. Christina’s industry expertise comes from a robust career spent at leading global hospitality and travel management companies. Starting in Montreal’s hospitality industry, she later transitioned to business travel management and spent more than 17 years advancing American Express Global Business Travel.

Dave is a senior software finance and operations executive who’s able to transform organizations into industry leaders. He has deep, hands-on experience with SaaS B2B and online B2C e-commerce business models, and his career spans venture-backed private companies, large public companies, and a multinational accounting and consulting firm. Prior to Deem, Dave was the general manager and chief financial officer at VerticalResponse, a Deluxe Company, CFO at Informative, Inc., and corporate controller at Travelocity. He’s also held financial management positions at SGI and Arthur Andersen.

Todd is an e-commerce veteran and entrepreneur who has served as a product management, marketing, and technology leader to some of the world’s premier brands. He has successfully delivered highly scalable and innovative products across the consumer, SMB, and enterprise market segments. His previous travel industry experience includes GetThere, Orbitz, TRX, Concur, and LesConcierges.

With 25+ years of global experience, Michelle is a transformational HR leader with a passion for building and sustaining a culture of engagement and belonging for all employees. She’s responsible for developing Deem’s global HR strategy, including talent acquisition, talent development, total rewards, and HR operations and is focused on integrating our people strategy with our business strategy to drive performance, growth, and organizational health. Prior to joining Deem, Michelle held executive roles at a variety of technology and consulting companies including Mixpanel, AppSense, Trend Micro, and PricewaterhouseCoopers.

Harper is a product and design leader with more than 15 years of experience in helping established brands and start-ups reimagine their products. Most recently the senior director of product experience at Deem, he was instrumental in launching Travel SafetyCheck and accessibility features in the Etta platform. As vice president of product, Harper will evolve the company’s strategic product vision, and align and execute that across the organization. He has previously worked with companies including Bloomberg R&D, Mission Motorcycles, and Clear Channel Media.

Tahnee is a marketing executive with more than 15 years of experience building high-performance teams in the travel industry. She has a passion for excellence in execution and currently leads Deem’s brand, marketing, and demand-generation efforts. In the past, she drove creative and marketing strategy for Northstar Travel Group, a B2B information solutions company, as well as for travel research authority Phocuswright. Tahnee was also director of marketing and technology at Aspen/Snowmass ski resort and led the communications team at Totalcare. She's a guest lecturer at Stanford University and a frequent industry speaker.