Archer will develop the agency’s range of products in medical education and expand its global partnership structure as well as giving strategic support to existing comms programmes.
He said: "I look forward to supporting the founders as they expand the business."
He joins 90TEN from Virgo Health, where he was global head of health education, leading a team of 35 people. Previous senior roles in health education include vice-president of educational services at Darwin Grey and director of Infinity, part of Innovex Medical Communications.
Carole North, managing director of 90TEN, said: "Paul’s significant experience in growing businesses, combined with his entrepreneurial flair and extensive connections, will drive our next phase of expansion."