Openreach's MD for Customer, Commercial and Propositions Katie Milligan will also lead the firm's Scottish Board when current chair Brendan Dick retires next March.
Milligan is a graduate of the Business School at the University of Strathclyde and has held a number of senior positions at BT Group.
She joined Openreach in 2009 and was previously its commercial director, leading teams through projects including the design and delivery of superfast fibre products and high bandwidth propositions for businesses and large organisations.
“This is a crucial time for the development of Scottish digital infrastructure as we pave the way to the analogue switch-off in 2025," said Milligan.
Openreach CEO Clive Selley added: “Katie’s strategic leadership and commercial acumen will be vital as we accelerate our ultrafast broadband build across the nation and deliver the Scottish Government’s challenging R100 build alongside our private investment.”