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:
Memorial Day: Monday, May 25, 2026
Juneteenth: Friday, June 19, 2026
Independence Day: Friday, July 3, 2026 (Observed)
Labor Day: Monday, September 7, 2026
Columbus Day: Monday, October 12, 2026
Veteran’s Day: Wednesday, November 11, 2026
Thanksgiving: Thursday, November 26, 2026
Day After Thanksgiving: Friday, November 27, 2026
Christmas Day: Friday, December 25, 2026
New Year’s Day: Friday, January 1, 2027
Martin Luther King, Jr. Day: Monday, January 18, 2027
President’s Day: Monday, February 15, 2027
MS-ISAC Members
State, Local, Tribal, and Territorial Governments (SLTT)
CIS Services
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