CISO appointment
Mimecast appoints Leslie Nielsen as Chief Information Security Officer
Leslie Nielsen is the Chief Information Security Officer of Mimecast. Leslie joins from Klaviyo, where they served as SVP and CISO.
Records: Mimecast · Leslie Nielsen
| Person | Leslie Nielsen |
|---|---|
| New role | Chief Information Security Officer |
| Company | Mimecast |
| Previous role | SVP and CISO, Klaviyo |
| Announced | week of September 1, 2025 |
| Added to the record | September 26, 2026 |
| Source | SecurityWeek Industry Moves (week of 2025-09-01) |
What this move signals
Leslie Nielsen has joined Mimecast as Chief Information Security Officer, coming from Klaviyo where he served as SVP and CISO. Prior to Klaviyo, Nielsen held SVP and CISO roles at Nuance Communications, SAP Concur, and SuccessFactors.
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