Operating System Support

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.


30 Years Global Experience

Extension of Your Team

The Support You Need

Direct Connect to L3 Engineers

Single Support Solution for your Entire Multi-OS IT Environment

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.

Software Supported

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


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


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


  • z/OS, z/VM, z/VSE, Linux for IBM Z, DB2, CICS, IMS DB/DC, and MQSeries

Tru64 UNIX

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

Sun Solaris

  • 2.4 – 11.3
  • Running on
    SPARC, x86


  • 1.0 – 8.4-2L1
  • Running on
    VAX, Alpha, 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.

Let’s talk mission critical support.

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.

Get to know Top Gun.

Top Gun provides Mission Critical Support Services to enterprise companies by leveraging our OverWatch℠ fabric that digitally connects technology, service operations, engineering, and global logistics.