ALISO VIEJO, Calif.--(BUSINESS WIRE)--Medical device company Vertos Medical Inc. has announced the expansion of its senior leadership team with the appointment of Randel W. Woodgrift to senior vice president of operations and research and development, and Ann Deren-Lewis to vice president of marketing. With decades of leadership experience in their respective functional areas, Woodgrift and Deren-Lewis have been tapped to support the accelerating U.S. commercialization of Vertos’ mild* technology for the treatment of lumbar spinal stenosis (LSS).