Stefanie began her career as an executive assistant for four years holding various roles at Viacom/MTV Networks/Nickelodeon, where she quickly learned how to be a "human resource", becoming known as her teams’ “go-to-person.”  After 4 years at Viacom and an exploratory vacation to Italy, in April of 2010 Stefanie saw at tweet for a Business Assistant position at Mashable and was hired at the time when the company was transitioning its 15 remote employees to its first-ever office.

Stefanie grew with the company and recognized the need for Human Resources, proposing that she be charged with creating the department.  In April 2011, Stefanie's wish was granted and she has been building Mashable's HR infrastructure ever since as head of HR. She works with Mashable’s leadership team to ensure that human resource programs and projects align with strategic business goals and operational objectives. To support Mashable’s unique and evolving company culture, she creates internal organizational strategy and policies, recruits and develops talent, cultivates employee engagement and manages company benefits.

 Stefanie earned a B.S. in Human Development from Cornell University. Find Stefanie on Twitter at @StefanieRennert or on Facebook at fb.com/stefanierennert or via email at stefanie@mashable.com

Rebecca R. Hastings, SPHR began her HR career with SHRM 23 years ago and has been with the organization ever since, working first as an HR practitioner, then as a knowledge advisor, manager, writer and editor. She has a B.S. in Management from George Mason University, an M.S. in Training and HR from Leicester University in Leicester, England, and has been continuously certified since 1993. Soon after earning her SPHR she was asked to participate in the HR Certification Institute’s exam development process. She recently joined the Institute staff as HR Content Manager for the PHR and SPHR exams.

A 14+ year veteran of the advertising and marketing industry, Mr. Vong first cut his teeth in the agency world at shops such as Cole & Weber, DDB Needham, and Austin Knight before joining TMP Worldwide in early 2000. In his current role, he is responsible for keeping us at the forefront of interactive innovation and emergent technologies, working closely with clients to deliver engaging and user-centric digital campaigns. He is also a member and co-chair of TMP Labs, TMP Worldwide’s internal think tank, tasked with development of next-generation recruiting strategies and tools.

His recent speaking topics include Emergent Technologies, Mobile Marketing, Interactive Branding and Strategy, Next Practices in Web Development, Ideation, Social Networks, Virtual Worlds Marketing, and Gaming.