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Partnerships
We build long-term relationships, not one-off projects. Many clients have trusted us for 20+ years with their software and IT needs.
Custom Software Solutions & Expert IT Services Since 1984
Your trusted managed IT services and custom software partner — serving Murrieta, Temecula, and clients nationwide.
Who we are
Trusted technology partners since 1984
For over four decades, we've helped businesses succeed by building custom software and delivering reliable IT support — trusted technology partners since 1984.
Whether you need a focused automation tool, a complete business management system, or day-to-day managed IT, we focus on practical solutions that fit how your business actually works.
Our Story
Four decades of building software & supporting businesses
Since 1984, SDSI Business Systems has grown from a custom software development company into a trusted technology partner for businesses across Southern California and nationwide. From industry-leading tools like Rapid Estimator to fully custom business management systems, we’ve built lasting client relationships by delivering practical solutions — and standing behind them for the long haul.
1984
Company Founded
Custom software development begins.
1990s
Rapid Estimator
Professional construction estimating software launched.
2000s
Long-Term Partnerships
Custom systems built for clients still in use today. Managed IT support expanded alongside software development.
2010s
Murrieta & Temecula
Local on-site IT support in the Inland Empire.
2015
Custom Business Systems
Tailored software for contractors & service businesses.
2018
Microsoft 365 & Cloud
Cloud migration and M365 implementation services.
2020
Nationwide Remote Support
Expanded remote IT assistance coast to coast.
2024
Modern .NET Development
Windows & .NET applications for today's businesses.
Today
40+ Years Strong
Custom software & IT services you can count on.
Our Value
What guides how we work
These core strengths guide how we build custom software, deliver IT support, and serve our clients every day — for over 40 years.
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Modern Approach
We use current Windows, .NET, and cloud technologies — without unnecessary complexity. Practical solutions that fit your business.
S
Scalability
Whether you need a focused tool or a full business management system, we build software that grows with you.
E
Experienced Team
Decades of combined experience in software development and IT support on every project and support call.
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Industry Expertise
We understand contractors, construction, manufacturing, and local service businesses.
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Innovation
From Rapid Estimator to fully custom automation tools, we create software that solves real business problems.
R
Responsibility
Proactive maintenance, reliable backups, and responsive support so your systems stay secure and running.
T
Integrity
Honest recommendations, fair pricing, and dependable follow-through. We do what we say.
Proven results built on decades of trust
Our Team
Dedicated team leaders
Meet the people who lead software development and IT support at SDSI.
United States
Southern California
We deliver tech excellence from our Murrieta office with local on-site support and nationwide remote coverage.
25060 Hancock Ave, STE 419Murrieta, CA 92562, USA Contact us
