Top Gun specializes in providing mission-critical OS enterprise systems support for all major operating environments. We integrate the right tools to create an exceptional customer experience that ensures maximum uptime and uninterrupted service for your business.

Home » Services » OS Support

Top Gun support features a variety of customized options to fit your business’s needs. You can choose from an array of support plans that offer different coverage and response times that range from basic to the particular needs of your business.

This includes 24x7x365 technical support and maintenance, customized patch assessment tools and implementation assistance, network problem solving, system tuning, and performance analysis. We take great pride in building long-term problem-solving partnerships with our customers.

We provide a single support solution for your entire multi-OS IT environment, directly connecting you to top-tier OS technical engineers on your first call.

30+ Years

Direct Connect
to L3 OS

Extension of

We Only Recommend
Support You

Software Supported

For OS-specific information on phone support, please view OS below:


  • 1.0 – 8.4-2L1
  • Running on
    VAX, Alpha, Integrity (Itanium)


  • 3.x – 7.x
  • Running on
    RS6000, Power 4 – 9

Tru64 UNIX

  • 1.x – 5.1B Patch 10
  • Running on
    Alpha Ev4 – EV7

Sun Solaris

  • 2.4 – 11.3
  • Running on
    SPARC, x86


  • 10.x – 11iv3
  • Running on
    HPPA (PA-RISC), Integrity (Itanium)


  • All RHEL, Debian, SuSE, CentOS
  • Running on
    x86, SPARC, Alpha, Integrity (Itanium)

Upgrade Your Support

Top-of-the-line tech support, a personal service experience, and a commitment to follow through on every problem. Regardless of the issue or complexity of your technology, you’ll have direct access to an OpenVMS, Tru64 Unix, HP-UX, AIX, Sun Solaris, and Linux (all versions of Red Hat, CentOS, Debian and SUSE) expert.

24/7 Responsiveness

  • Unlimited US based support available 24×7
  • Immediately bypass level 1 and 2 support

Connect to L3 Engineers

  • Connect directly; avoid wasting time with call escalation
  • Our engineers have an average of 35+ years experience

Comprehensive Reporting System

  • Thorough case histories documented in ServiceNow
  • Flexible call tracking system offers reporting & updating via email, phone and online

Why Choose Top Gun for OS Support?

ServiceNow Integrations

Your business is big – and so are the demands on your technology. Top Gun makes it easy for you to get a team of IT professionals working on your issues – by phone, email, or virtual screen-sharing session – quickly and seamlessly through ServiceNow.

Health Check Service

Top Gun’s customizable Health Check Service allows proactive management of your system’s performance, security, and day-to-day operations using VPN or secure remote access. Our engineers work constantly to build security into our products. In addition, we can also create patches for common security and functionality issues with particular versions of our supported operating systems list.


Powered by ServiceNow, Top Gun Technology provides TPM 2.0™ maintenance services that are uniquely designed to deliver the highest quality of infrastructure support for mission critical operations.

Meet Top Gun
Mission Critical - The Top Gun Difference

Let’s Talk Professional IT Services

As a Top Gun client, you’ll notice a superior level of commitment and personalized support – day or night – from the most experienced technical engineering team in the industry. Proven. Trusted. Reliable