MOUNTAIN VIEW, Calif.--(BUSINESS WIRE)--Perlegen Sciences today announced the expansion of its senior leadership team with the appointment of Bryan Walser, MD, JD as Interim Chief Executive Officer and the appointment of co-founder Brad Margus to the position of Executive Vice Chairman. Dr. Walser will assume overall responsibility for management of the company’s operations, organizational development and honing Perlegen’s strategic mission. Mr. Margus will focus on strategic opportunities with the company’s business and financial partners to accelerate Perlegen’s vision of personalized medicine and capitalize on the firm’s competitive advantages.