Paul Massara is to take the CEO role at energy blockchain firm Electron.
The former Npower chief executive joined Electron as a non-executive director last year.
Founder and current CEO Paul Ellis will become company chairman.
Electron has been expanding its team after securing both public and private funding, and this week announced further investment from Systemiq, an investment and advisory firm that invests in potentially disruptive companies (it also recently invested in Upside Energy).
Electron believes its blockchain platform could provide a more efficient way of managing the energy system, and is working to develop an energy flexibility trading platform.
Partners in that project include: Baringa, EDF Energy, Flexitricity, KiWi Power, Northern Powergrid, Open Energi, Shell, Statkraft and UK Power Networks, as well as Siemens and National Grid.