Stephen Klisiewicz
- Full Name: Stephen Klisiewicz
- Species: Human
- Gender: Male
- By October 2265: Ensign, chief science officer, Starfleet; USS Endeavour (VAN Novel: Harbinger, Summon the Thunder)
- November 2265: Lieutenant, chief science officer, Starfleet; USS Endeavour (VAN Novel: Summon the Thunder)