Stephen Sumner is a director at Caliber, where he plays a key role in creating and implementing PR strategies that drive results. Stephen is also focused on developing and nurturing strong relationships with clients, as well as leading and mentoring members of the wider Caliber team.


With over 15 years of experience in the public relations and tech industries, Stephen is adept at helping companies create compelling stories that resonate with their audiences. He previously served as a senior communications supervisor with Lightspeed PR, where he crafted targeted communications and messaging campaigns for clients. He has also served as a public relations manager for strategic branding firm Siegel + Gale, as well as holding senior roles at Weber Shandwick.


Stephen has advised many companies in the fintech, martech and professional services industries, with a specific focus on helping startups raise their profile. He has helped lead several tech startups through the acquisition process to successful exits; firms he has worked with have been acquired by companies such as Salesforce and advertising giant WPP.


Stephen has a bachelor’s degree in International Relations and French Studies from Bucknell University, along with a master’s degree in Public Administration from NYU. 

Choose Caliber to enhance your communications efforts — and reach 

relevant clients, media, investors, and partners.

© 2019 by Caliber Corporate Advisers, LLC

All Rights Reserved.



22 W. 38th Street, 9th Floor

New York, NY 10018



2301 W. Anderson Lane

Austin, TX 78757




Caliber is a strategic marketing communications firm that helps companies tell their story and connect with key stakeholders. We provide best-in-class strategy and tactical execution of content marketing, public relations, media training, and digital marketing.

  • LinkedIn - White Circle
  • Twitter - White Circle