The move is a change from her position as commercial director of its specialist mortgages arm.
Upton (pictured) has been brought in to manage the development finance arm which has seen an increase in new business volumes since August.
HTB said the flow of the division’s business showed no signs of slowing and Upton will act as deputy to David Alcock, managing director of development finance to oversee its growth.
Alcock said: “Alex Upton has made an important contribution to the successful development of the specialist mortgages division which, under the able leadership of Charles McDowell, is now the largest single business within HTB.
“Alex’s skills and capability will be invaluable in helping me to manage and channel the structural growth we are driving in our development finance portfolio.”
Upton added: “I’m keen to broaden my experience and this is an exciting opportunity to help David scale up his business.
“Specialist mortgages now has a team of very able people and my move will create the space for some of those people to take on new responsibilities.”