William Sieller

William Sieller currently serves as a Revenue Manager at Iron Mountain, a position held since March 2022. Previously, William worked as a Financial Planning and Analysis Manager at Limelight Networks, where responsibilities included performing variance analysis, assisting with financial planning, preparing financial statements, and facilitating operational reviews. William's experience also includes roles as a Sales Operations Manager and Quote Desk Manager at Limelight Networks and New Horizon Communications, respectively. Earlier in the career, William served as a Pricing Analyst and Premier Account Analyst at Granite Telecommunications and gained initial marketing experience as an intern at Customer Portfolios. William holds an M.B.A. from Suffolk University and a B.A. from Susquehanna University.