Thomas Waun serves as Division President for Aperture, a recent acquisition of Emerson. Mr. Waun is an industry veteran with over 20 years' experience in executive management, strategy development, and sales. He first joined Emerson in 2006 as Vice President of Sales where he was responsible for the overall management of all major accounts including Motorola, EMC, and IBM.

Prior to joining Emerson, Mr Waun served for 15 years at IBM in a variety of leadership roles, including as Business Development Executive responsible for business transformation outsourcing, and as Vice President, responsible for the sales and marketing of retail store solutions in the Americas. Other roles at IBM included Director of North American OEM Sales for the technology group. Mr Waun has also served as director of North American OEM sales for Hitachi Global Storage Technologies.

Mr. Waun earned a bachelor's degree in electrical engineering from the University of Michigan.

Steven Yellen brings over 25 years of extensive technology, sales and marketing experience to his role as Vice President of Sales and Marketing at Aperture. He is responsible for Aperture’s global sales and marketing plans and customer lifecycle management. He has authored numerous white papers and technical articles, and has frequently spoken at industry conferences and seminars on both Data Center Management and Technology Marketing.

Previously, Mr. Yellen served as Product Line Manager of Windows Products at DataViz. At DataViz, he brought the company's first Windows product to market. Mr. Yellen has also held technical and management positions at McDonnell Douglas and IBM.

Mr. Yellen has been an active voice within the technology thought-leadership realm throughout his career. He received his Masters in Business Administration in Marketing from the University of Connecticut, Masters in Science in Electrical Engineering from Cornell University and Bachelors of Science in Electrical Engineering from the University of Connecticut.

Eileen Spellman joined Aperture in 2003 as Director of Finance and brings 15 years of experience in financial controls, policies and procedures – including cash management and related forecasting, audits, budgeting, business plans and human resources management. At Aperture, Ms. Spellman is responsible for all global accounting, budgeting, financial reporting and maintenance renewals. She has established a number of key corporate policies relating to financial governance, internal controls and human resource management. She is committed to maintaining profitability through business process integration and cost management throughout the company.

Ms. Spellman has worked at a variety of companies before she joined Aperture including most recently Peppers & Rogers Group, a customer relationship management consulting company where she was Assistant Controller. Her other responsibilities included involvement in the creation and implementation of Web-based project economics, utilization and operational reporting as well as management of all financial closings, audits and reporting. Ms. Spellman was also a member of the executive team of PhotoChannel, an e-commerce startup that specialized in online photo processing and network creation for retail photo outlets where she directed the U.S. headquarter’s financial operations and Oracle systems implementation. She also helped launch the company’s U.S. presence as well as establish and document its corporate policies and procedures.

Previously, Ms. Spellman served as Controller and Manager of Finance and Information Systems at Electronic Retailing Systems International, a publicly traded innovative technology leader in wireless electronic shelf labels sold to medium to large supermarkets. She has also worked at News America Marketing (formerly Actmedia) as Director of Financial Operations and Systems. Ms. Spellman received her Bachelor of Science degree in Business Administration from Iona College and subsequently has qualified as a CPA.