Managed IT Support
Computer & network installation/setup, troubleshooting, ongoing maintenance, and reliable on-site/remote support for Windows environments. Local service in Murrieta & Temecula.
Learn more →Since 1984 · Murrieta & Temecula · Nationwide remote
Powerful Custom Software & Reliable IT Services
Custom Windows & .NET software development · Expert IT support & managed services. Local support in Murrieta & Temecula · Nationwide remote assistance.
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Years experience
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Projects delivered
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Client satisfaction
Our Core Services
What we deliver every day
Delivering custom software solutions and reliable IT support to help businesses operate efficiently, securely, and grow confidently.
Custom Software Development
Custom Windows applications, .NET, and C# software built specifically for your business needs — from automation tools to complete business management systems.
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Cloud Setup & Microsoft 365
Secure cloud setup, Microsoft 365 implementation, automated backups, and hybrid solutions that enable your team to work anywhere.
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System Integration & Databases
Custom system specifications, database design, integration, and seamless connectivity between your existing software, hardware, and business processes.
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Our capabilities
Fuel your business with the technology you need to succeed
From custom software development to reliable IT support, we deliver practical solutions that help your business run smoother and grow stronger.
Custom Software Development
Custom Windows, .NET, and C# applications built specifically for your business needs — from automation tools to complete business management systems.
Managed IT Support
Computer & network setup, troubleshooting, maintenance, and reliable on-site + remote support. Local in Murrieta & Temecula.
System Integration & Database Solutions
Custom system specifications, database design, and seamless integration between your existing software and hardware.
Microsoft 365 & Cloud Setup
Microsoft 365 implementation, secure cloud migration, automated backups, and hybrid solutions that let your team work anywhere.
Automation & Business Efficiency
Process automation, workflow optimization, and custom tools that reduce manual work and increase productivity.
IT Consulting & Project Guidance
Strategic IT planning, system assessments, technology roadmaps, and expert guidance for your digital transformation.
Network & Infrastructure
Professional network design, server installation, hardware setup, and secure infrastructure solutions for reliable business operations.
Data Backup & Disaster Recovery
Automated backup systems, disaster recovery planning, and business continuity solutions to protect your critical data.
Why choose SDSI
Why choose SDSI Business Systems?
Innovation
Expertise
Reliability
About us
Custom Software Development & Expert IT Support Since 1984
For over four decades, SDSI Business Systems has helped Southern California businesses — and clients nationwide — succeed with practical custom software and dependable IT support.
Products
Software we build and support
Explore Rapid Estimator and our custom software solutions — including video overviews from the team.
Rapid Estimator
Construction estimating software trusted by contractors for 25+ years — watch the client story.
View product & video →Custom Software
Windows & .NET systems tailored to your business — see how we approach custom solutions.
View product & video →All products
Browse both projects, video clips, and how we support software for the long haul.
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Proven Results
Real results from real local businesses since 1984
Allen
Construction Contractor
★★★★★
“SDSI created Rapid Estimator, and we’ve been using it successfully for over 25 years. Their custom solution has transformed our estimating process and protected our profitability. The support is excellent — a true game-changer for our business.”
Randy
Owner, United Concrete Coring & Sawing
★★★★★
“SDSI created our custom business management software more than 20 years ago. It continues to run our entire operation flawlessly to this day. The reliability and ongoing support we’ve received from SDSI is outstanding!”
David
Founder & CEO, DLPHARES Real Estate Investment Group
★★★★★
“For 25 years, SDSI has been our trusted IT partner. They created custom software tailored to our real estate investment business and have supported it flawlessly ever since. SDSI is truly an exceptional long-term partner.”
Carla
CEO, Paradise Mountain Farms
★★★★★
“SDSI developed a custom Flower Brokerage Program that automated our entire operation — ordering, inventory tracking, and sales. It has saved us significant time and streamlined our business. We couldn’t be happier with the results.”
Graham
Owner, Top Notch Auto
★★★★★
“SDSI’s IT team has provided complete IT support for our business since the day we opened our doors 20 years ago. From network setup and hardware support to cybersecurity and ongoing maintenance, their reliability and proactive service have been invaluable.”
Common Questions
How can we help your business?
What kind of custom software do you develop?
We create tailored Windows-based software solutions including estimating, job costing, scheduling, inventory management, business automation tools and more.
Do you provide local IT support?
Yes. We offer full-service local IT support in the Murrieta/Temecula area — including network setup, cybersecurity, hardware support, and ongoing maintenance.
How long does it take to build custom software?
Most custom programs take 8 to 16 weeks, depending on complexity. We provide regular updates throughout the entire process.
Do you provide remote support?
Yes. We provide fast and reliable remote IT support. We can resolve most technical issues remotely, perform software updates, monitor security, and assist with troubleshooting without needing to be onsite.
What industries do you serve?
We specialize in contractors, remodelers, construction companies, manufacturers, property managers, and other local service businesses.
United States
Southern California
Located in Murrieta, California, SDSI Business Systems has delivered custom software development and trusted local IT support to Southern California businesses since 1984.
25060 Hancock Ave, STE 419Murrieta, CA 92562, USA
(951) 461-8490
pthomas@sdsinow.com Contact us
