Business IT Support and Managed IT in Southern California
Castle IT Solutions helps businesses in Orange, Los Angeles, San Bernardino, and Riverside counties keep their people connected and their technology supported. Get help with office computers, Microsoft 365, networks, security, and ongoing IT management from a team you can contact directly.
Support for businesses and professional offices, with onsite work and remote assistance scoped to your location and needs.
Discuss your business IT needs or call (909) 979-2128.
When your office needs an IT technician
An employee cannot sign into email. The office Wi-Fi keeps dropping. A new hire needs a computer and secure access before their first day. These are business support needs, not just isolated device repairs.
Castle IT can help resolve the immediate issue and review the systems behind it. We discuss the effect on your team, the devices and applications involved, and who currently manages them before recommending work. Urgent requests are prioritized by business impact and the applicable service agreement; we do not promise a blanket arrival or resolution time.
Commercial IT services available
Managed IT and help desk
Ongoing user support, monitoring, maintenance, patch planning, and practical technology guidance. Your proposal defines the systems covered and the support responsibilities.
Office computers and onsite support
Hands-on troubleshooting, workstation setup, equipment replacement, and office technology projects. We confirm location, access, scheduling, and scope before arranging a visit.
Microsoft 365 and remote teams
Support for email, Teams, SharePoint, licensing, migrations, and account access. Help employees work across offices and remote locations with appropriate security controls.
Networks, security and backups
Business Wi-Fi, firewalls, VPNs, servers, endpoint protection, email security, and backup oversight. We identify responsibilities and risks rather than promise that any system is risk-free.
Managed IT services for Los Angeles and Orange County
For businesses in Los Angeles County and Orange County, Castle IT can combine recurring user support with agreed maintenance, Microsoft 365 administration, security, and backup oversight. We scope support around your staff, applications, offices, and existing IT resources, with remote assistance and onsite work planned for the needs of each location.
IT support in the Inland Empire
Our Inland Empire service area includes Riverside and San Bernardino counties. Tell us which offices need support, what requires a visit, and which systems your team relies on. We confirm scheduling, access, coverage, and responsibilities before agreeing to ongoing support or a project.
Supporting businesses across four Southern California counties
Our Southern California coverage includes Orange County, Los Angeles County, San Bernardino County, and Riverside County. Remote assistance can handle many account, software, and cloud issues; installations, cabling, and some hardware problems need an onsite plan.
Tell us the city, number of locations, and type of help required so we can confirm fit and onsite coverage. This is a service area, not a claim that Castle IT operates a storefront in every county.
Have staff in Idaho too? See our Treasure Valley IT support and managed services. We can discuss responsibilities across your locations without assuming that every office needs the same setup.
One project or an ongoing IT relationship?
A defined project may be the right fit for an office move, a Microsoft 365 migration, or a network upgrade. Ongoing managed IT is worth discussing when recurring support, maintenance, security, and documentation need a clear owner.
We scope work around your users, devices, business applications, locations, and existing providers. Ask us to explain what is included, what remains your responsibility, how support requests are handled, and which third-party costs apply.
Business websites, hosting and SEO
If your website needs attention as well as your office technology, Castle IT offers website design, WordPress management, hosting, and SEO services. Website work has its own agreed goals and scope; it is not automatically included in an IT support plan. Explore business website, hosting and SEO services.
Frequently asked questions
Is this service for home computer repairs?
Our focus is commercial clients: businesses, professional offices, and organizations with employees who depend on technology. This page describes business support rather than a residential repair service.
Can you work with our existing IT provider?
We can discuss a specific project or support gap alongside your existing team. Access, ownership, and responsibilities need to be agreed before work starts.
What should we bring to a consultation?
Your business location, approximate staff and device counts, main applications, current support arrangement, and the problems you want to solve. Do not send passwords or sensitive client records through the contact form.
How much does business IT support cost?
Pricing depends on the environment and scope. We review the work and support expectations before presenting a proposal rather than quote a one-size-fits-all rate.
Why work with Castle IT?
Chris, Cody, and Marc bring hands-on experience across support, cloud services, infrastructure, and security. Castle IT is a Microsoft Cloud Solution Partner. Our approach is direct access to the team, clear responsibilities, and recommendations you can understand. Meet Castle IT.
Talk through your Southern California IT needs.
Start with a free 15–30 minute consultation. We will discuss your situation and whether Castle IT is a good fit.