Publicis Healthcare Communications Group’s (PHCG) has announced the promotions of Sam Welch to president of its Saatchi & Saatchi Healthcare Communications (SSHC) group and Dave Marek as SSHC’s managing director.Welch will report directly to Mike Trepicchio, who was named PHCG’s president, North American advertising last month.Welch, most recently served as managing director for SSHC’s Saatchi & Saatchi Healthcare Advertising unit. He joined SSHC, formerly known as Klemtner, more than 10 years ago, as VP, account group supervisor for the agency’s Prilosec business. Marek, who will report directly to Welch, joined Klemtner six years ago as VP, account group director for Enbrel.