Coulthread was previously interim chief operating officer at Elexon – the electricity market operator – and has also worked in similar roles for Barclays, the Qualifications and Curriculum Authority, BT and Tesco.
As chief operating officer, he will lead the work of the Market Engagement and Market Services teams; oversee the delivery of the integrated programme plan; and help to transition MOSL to become the enduring market operator.
MOSL chief executive Ben Jeffs said: “I am pleased to welcome Mark to the team at a pivotal moment in our development.
“His joining comes at a perfect time, as we prepare to enter User Acceptance Testing and our focus begins to shift from delivering the central market system to supporting members to use it.”
MOSL is working with Ofwat and Defra on behalf of its members to support the government’s Open Water programme, which aims to create a competitive market for some 1.2 million non-household customers in England in April 2017.