Medical Solutions named Nhat Ngo as chief commercial officer. Ngo comes to Medical Solutions with more than 20 years of experience; he previously served as executive VP, marketing, strategy and business development with Omnicell. Prior to that, Ngo spent two years at Medtronic as global VP of business development and a member of the senior leadership team.

Sean Zimdahl, founder of Aston Carter and current president of Allegis Group EMEA, will be stepping down from the role and leaving the company. Allegis acquired Aston Carter in 2011 and Zimdahl became president of the EMEA business in 2013.

TalentRise, a Chicago-based executive search and talent management consulting firm, promoted Kristen Lampert to managing director of the firm’s talent consulting and coaching practice. Lampert most recently served as senior talent and leadership consultant at the firm.

Gilbert Carrara Jr. MD joined executive search firm Boyden as managing partner in the US and as Americas leader, healthcare and life sciences.