Cyberattacks on three European wind-energy companies since the start of the war in Ukraine have raised alarm that hackers sympathetic to Russia are trying to cause mayhem in a sector set to benefit from efforts to lessen reliance on Russian oil and gas.

Many security and risk executives aren’t just looking at their immediate cybersecurity staffing requirements but also at what they’ll need if people leave. “You have to start planning way in advance,” said Visa Inc. Chief Risk Officer Paul Fabara.