Customer Support Knowledge Base

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Central Support

Central Support’s mission is to provide world-class customer service for all MS-ISAC members and CIS customers. Central Support is responsible for actioning Tier 1 issues and triage of escalations throughout CIS.

Contact Support

CIS Company Holidays:

Labor Day: Monday, September 1, 2025
Columbus Day: Monday, October 13, 2025
Veteran’s Day: Tuesday, November 11, 2025
Thanksgiving: Thursday, November 27, 2025 & Day After Thanksgiving: Friday, November 28, 2025
Christmas Day: Thursday, December 25, 2025
New Year’s Day: Thursday, January 1, 2026
Martin Luther King, Jr. Day: Monday, January 19, 2026
President’s Day: Monday, February 16, 2026
Memorial Day: Monday, May 25, 2026
Juneteenth: Friday, June 19, 2026
Independence Day: Saturday, July 4, 2026

MS-ISAC Members

State, Local, Tribal, and Territorial Governments (SLTT)


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