Corporate Overview

MSSi Means Support & Service

Midrange Support & Service

Midrange Support & Service, Inc. was founded in 1993 by Steve Marinak III. The mission was to provide the very best support & service, specifically for the IBM AS/400 customer.

MSSi’s employees are strategically located throughout the state of Florida. We are right around the corner in most cases. Along with this we offer remote technical services; even complex OS upgrades can be performed completely off-site via secure internet access.

Our technical staff is made up of former IBM employees; each IBM Certified, with a long tenure of highly trained expertise specific to IBM Power Systems. When you engage with MSSi, you are backed by over a century of service expertise.

MSSi treats each and every customer as though you are a Fortune 50 account, personal friend, and respected individual. Our basic beliefs are as follows:

Commitment to the client’s success
The obligation to deliver the best service possible
Trust and responsibility in all relations

In 2016, Champion Solutions Group acquired Midrange Support & Service, Inc. to provide customers with an extensive suite of offerings and unmatched technical expertise. Our goal with this merger is to continue to put our client’s needs first and to help companies unleash the business value of their IT investments for outcome-based results that benefit the customer. Champion Solutions Group is an award-winning partner and thought leader who has been serving the IT community since 1979. Champion has a wide breadth of product and services offerings that can fulfill most of your IT needs. Together, we can now assist you with these technology brands:

  • The complete IBM product line (including IBM Power and i)
  • Barracuda
  • Cisco
  • Citrix
  • DocuSign
  • ExaGrid
  • ExtraHop
  • Microsoft Cloud
  • Computing (Office 365 and Azure)
  • NetApp
  • Nutanix
  • Palo Alto Networks
  • Pure Storage
  • Red Hat
  • Tintri
  • Varonis
  • VMware
  • Veeam


The MSSi technical team consists entirely of former IBM employees. These technology experts hold and maintain multiple IBM professional certifications. IBM has awarded both Champion Solutions Group and MSSi the distinction of “Premier Business Partner”, designating us as a leader among its peers. Exceptional support, legendary service… It’s our name.