Tiernan Wallace

Tiernan Wallace is a seasoned sales professional with over 25 years of Enterprise and Federal experience, currently serving as the Business Development & Sales Manager at Siemens Government Technologies since December 2024. Previously, Tiernan held the position of Chief Revenue Officer at 1Marksman from April 2021 to December 2024, showcasing a strong ability to maximize business opportunities and lead high-performing teams in competitive environments. Prior roles include Vice President of Sales at i4DM, a leading Microsoft Gold Partner focused on business intelligence solutions, and Vice President/Chief Sales Officer at Convergence Technology, a firm specializing in application delivery and various IT solutions. Tiernan earned a BA in History and English from the University of Maryland between 1990 and 1994.