Dennis Theisen
About Dennis Theisen
Dennis Theisen is a Senior Manager of Enterprise Storage Systems at HSBC, where he has worked since 2003. He has extensive experience in enterprise storage, having previously held various positions at Household International and Walgreens.
Work at HSBC
Dennis Theisen has been employed at HSBC since 2003, currently holding the position of Senior Manager for Enterprise Storage Systems. In this role, he oversees the management and optimization of storage systems, ensuring efficient data handling and infrastructure support. His extensive experience in enterprise storage has contributed to the organization's data management strategies and operational effectiveness.
Previous Experience at Household International
Before joining HSBC, Dennis Theisen worked at Household International for a total of 12 years in various capacities. He served as Manager of Enterprise Storage Systems from 1999 to 2003, and prior to that, he held roles including Manager of Capacity Planning from 1990 to 1995, and MVS Systems Performance Analyst from 1986 to 1990. His diverse roles at Household International provided him with a solid foundation in storage management and capacity planning.
Education and Expertise
Dennis Theisen studied Pre-Law Studies at St. Norbert’s College in DePierre, Wisconsin, and at the University of Illinois. His educational background complements his extensive experience in enterprise storage systems and data management, equipping him with analytical skills relevant to his professional roles.
Achievements in Data Management
Throughout his career, Dennis Theisen has implemented significant data management solutions. Notably, he executed Data Domain’s Data De-Dup backup solution, which eliminated tape infrastructure in a data center pair and replaced legacy STK Silos with Quantum LTO technology. He also led the migration of over 50 TB of online storage and managed the transfer of over 200 TB of Main Frame storage and 1 PB of tape data, showcasing his expertise in large-scale data operations.
Team Management and Responsibilities
Dennis Theisen has managed a team responsible for a substantial amount of data storage, overseeing over 1,000 TB of MVS and 13,000 TB of Open Systems and iSeries online storage. His leadership in this area has been crucial for maintaining operational efficiency and ensuring the integrity of data management practices.