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The experts at SDSI Business Systems, Inc. are trained in the planning, building and managing of custom and packaged business solutions.


SDSI Business Systems Inc. is a family-owned and operated business located in Murrieta, California.  The principals are Jean M Barnett and her sons Patrick S. Thomas and John Paul Thomas.  Jean, Patrick and John Paul are Microsoft Certified Professionals.


Our mission is to provide well designed, integrated business solutions which fit the needs of our clients using the latest technology.  Our professional reputation for dependability and excellence is based on our philosophy to understand the requirements, scope and nature of each project and our ability to communicate effectively with our clients.


  • Software Package and Deployment Services

  • Consulting Services

  • Remote Support and Training

  • ​Custom Programming

  • ​Conversions

  • ​IT Management​​

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