Jamie Pinot resigned as chief financial officer and assistant company secretary of Tyrian Diagnostics, and will be replaced by Michael Vamos.
Pinot resigned effective Jan. 15 to pursue other career opportunities, Tyrian said in a statement. Vamos replaces him effective Feb. 2.
Vamos most recently was a group commercial manager for Mini-Tankers Australia.
Ian Pike was named chief operating officer of Proteome Sciences last month, while Hans-Dieter Zucht was appointed chief technical officer of the firm.
Pike had been Proteome Sciences' chief business officer. Zucht had been head of bioinformatics for the firm.
Also, Peter Schulz-Knappe resigned as chief scientific officer and as a director at the company effective Dec. 31. He joined the executive board of Protagen earlier this month.