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IT Support, Operations, Maintenance

Reliable IT support and sustainment for mission-critical systems. From end-user support to cloud and database operations. We ensure stability, efficiency, and performance at scale.
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About Us

IT Support, Operations, Maintenance

Reliable IT support and sustainment for mission-critical systems. From end-user support to cloud and database operations. We ensure stability, efficiency, and performance at scale.
Contact Us
About Us

    IT Support, Operations, Maintenance, Sustainment    

Horizon delivers world-class Tier 2 and Tier 3 support to over 30,000 end users, along with advanced support for complex software systems, databases, server environments, and cloud infrastructures. We support one of the largest mission-critical information systems in the U.S. government—used across the entire Department of Defense and by the majority of civilian agencies.

Core functional areas of the Capability

Where Stability Meets Innovation in IT
Looking for reliable IT solutions that scale with your mission? Horizon delivers expert support and system sustainment for complex federal environments. Whether you need cloud management, end-user support, or infrastructure maintenance our team is ready to help. Let’s talk about how we can support your goals.
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Trusted IT Operations That Power Federal Missions

Horizon delivers reliable, scalable support for critical government systems. From end-user assistance to complex cloud and software sustainment, we ensure continuous performance and operational excellence across every layer of your IT infrastructure.

30k+ End Users Supported

Proven experience providing Tier 2 and Tier 3 support across federal agencies.

99.9% Uptime Across
Client Systems 

Reliable infrastructure sustainment with minimal disruption.

20+ Years in Federal IT Services

Deep domain expertise in supporting government operations and technology.

24/7 System
Monitoring 

Around-the-clock support for mission-critical environments.

Our Process

A clear, agile process tailored to your mission—built for efficiency, scalability, and security.

01 Assessment & Planning

We begin by understanding the agency’s technical landscape, identifying gaps, and designing a support framework aligned with mission needs.

02 Deployment of Tiered Support

Horizon deploys dedicated Tier 2 and Tier 3 engineers for hands-on user support, system tuning, and issue resolution.

03 Sustainment & Optimization

Continuous monitoring, patching, and optimization of cloud platforms, software, and database environments to ensure long-term reliability.

04 Scalable Refresh & Migration

We manage computing device lifecycle operations—handling refreshes, migrations, and transitions with minimal disruption.

Real Solutions - Proven Results

See how Horizon delivers real-world impact. Our case studies showcase tailored solutions, measurable results, and long-term client success.

We’re Here To Help

Don’t hesitate to reach out to ask for help! Contact us now.

(703) 242-3022
8245 Boone Blvd #300 Vienna, VA 22182
Full life-cycle of support through business strategy analysis, business system development, and operations support.
(703) 242-3022
8245 Boone Blvd #300 Vienna, VA 22182
Global Affiliates : Ametras, Romania, Horizon Industries International, England, HIL InfoTech, India.
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