A Tustin managed IT firm at 3002 Dow Street, Suite 218, founded in 2004 by Ali Karimi, described on its own site as a 25-year IT veteran, author and cybersecurity expert, publishing a 15-minute response promise for a local engineer and 24/7 monitoring with round-the-clock threat detection, and selling managed IT, cybersecurity, cloud computing, business continuity and disaster recovery, IT outsourcing, email and spam protection and HIPAA, PCI and CMMC compliance support across Orange County for Tustin businesses.
GTI is a managed IT services provider based in Tustin, CA, operating since 2004. Across 12 verified Google reviews it averages 5.0 out of 5, a public track record you can weigh during diligence. It focuses on Managed IT Services, Cybersecurity & Threat Protection, Cloud Services & Migration, Backup & Business Continuity. Compare it against other Tustin managed IT providers, then request a quote.
Vetted by the Best IT MSP editorial team · Last updated October 2026
About GTI
GTI is a managed IT services provider based in Tustin, CA, delivering managed IT, cybersecurity and cloud to small and mid-size businesses across Orange County. The firm supports both fully managed IT and co-managed IT for companies that already have internal staff.
It holds a 5-star rating across 12 verified Google reviews. Tustin's economy runs on manufacturing, healthcare and professional services, with Tustin Legacy drawing advanced manufacturing and aerospace tenants and most IT providers serving the city from Tustin itself, Irvine or Santa Ana; GTI differentiates through a Tustin managed IT firm at 3002 Dow Street, Suite 218, founded in 2004 by Ali Karimi, described on its own site as a 25-year IT veteran, author and cybersecurity expert, publishing a 15-minute response promise for a local engineer and 24/7 monitoring with round-the-clock threat detection, and selling managed IT, cybersecurity, cloud computing, business continuity and disaster recovery, IT outsourcing, email and spam protection and HIPAA, PCI and CMMC compliance support across Orange County.
Core services span managed IT, cybersecurity and threat protection, Microsoft 365 and cloud, network management, backup and disaster recovery, and IT strategy. Typical clients are Tustin-area organizations in healthcare & medical, nonprofit, professional services and manufacturing & distribution that want 24/7 IT support and predictable monthly costs from a single accountable partner.
Services Offered
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Managed IT Services
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Cybersecurity & Threat Protection
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Cloud Services & Migration
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Backup & Business Continuity
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Compliance & Risk Management
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IT Help Desk & End-User Support
Industries Served
💊 Healthcare & Medical
🤝 Nonprofit
📋 Professional Services
🏭 Manufacturing & Distribution
Why Choose GTI
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5/5 Across 12 Google Reviews
A 5-star Google rating across 12 verified reviews is a strong, public signal of consistent delivery. For a Tustin business doing diligence, that track record matters more than marketing claims.
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Local Tustin Presence
Based in the Tustin, CA area, GTI can dispatch on-site across Tustin and the wider Orange County market while resolving most issues remotely.
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Proactive, Security-First Managed IT
GTI differentiates through a Tustin managed IT firm at 3002 Dow Street, Suite 218, founded in 2004 by Ali Karimi, described on its own site as a 25-year IT veteran, author and cybersecurity expert, publishing a 15-minute response promise for a local engineer and 24/7 monitoring with round-the-clock threat detection, and selling managed IT, cybersecurity, cloud computing, business continuity and disaster recovery, IT outsourcing, email and spam protection and HIPAA, PCI and CMMC compliance support across Orange County. Engagements cover 24/7 monitoring, help desk support, backup and disaster recovery, and IT strategy as a predictable monthly service.
Offices
GTI lists 3 offices. Choose one to see it on the map.
Across 12 verified Google reviews, GTI averages 5.0 out of 5. Weigh that public track record alongside a direct quote.
Which IT services does GTI provide?
GTI delivers Managed IT Services, Cybersecurity & Threat Protection, Cloud Services & Migration, Backup & Business Continuity, Compliance & Risk Management, IT Help Desk & End-User Support to organizations across Tustin, CA.
What area does GTI serve?
GTI is based in Tustin, CA and supports businesses across Tustin and the greater metro area.
When did GTI start?
GTI has been operating since 2004.
Is GTI certified?
GTI carries HIPAA Compliant, CMMC, PCI-DSS.
Contact
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