About 80 jobs are to go at a body which regulates more than 120,000 solicitors in England and Wales.
The Solicitors Regulation Authority (SRA) said there would be about 560 staff by the end of the year, compared with the current workforce of 640.
The body, which has bases in Redditch, Worcestershire, and Leamington Spa, Warwickshire, said it was part of a restructuring programme.
The SRA plans eventually to move to a single site in the region.
Chief executive Antony Townsend said there would be "some redundancies where we cannot redeploy existing staff".
He said: "This is the final stage of our programme to equip the SRA to be a modern, risk-based regulator, capable of meeting the needs of consumers of legal services in a radically changing legal sector.
"A combination of retrained staff, the targeted appointment of new staff members with new skills, and the replacement of our old and inefficient IT systems, will enable us to deliver effective and efficient regulation with a lower cost base than before."
The SRA said no decision had been taken on where it would move to in the West Midlands.
The changes in the workforce were not related to this longer-term aim, it added.