is leaving his post as Vice Chairman of RappDigital, the digital-marketing arm of Omnicom Group's Rapp Collins Worldwide, New York. Sandom, who founded RappDigital, assumed the
role of Vice Chairman in October when John Anderson
, previously Executive Vice President of the agency, was promoted to General Manager. Sandom, who is leaving to pursue other opportunities,
will continue to work with RappDigital on a consulting basis.