robert fronkRobert Fronk, one-time executive VP and global reputation leader at Harris Interactive, has moved to Purple Strategies in Alexandria.

While at Harris, Fronk "pioneered the evolution of brand reputation from lists and indices to actionable tools and models to help inform and drive business success," according to PS.

"Few people have 30 years of experience building and renewing iconic brands like Robert has. It is a big treat to welcome him into the Purple family," said a statement from Alex Castellanos, founding partner and PS chairman.

Nielsen Co. acquired Harris in Feb. 2014. Prior to Harris, Front ran his own firm and did a stint at Sapient.