Helical Bar chairman Giles Weaver is to leave the company after almost 19 years as part of a raft of changes at the listed company.
Weaver, who has served as chairman for the past seven years, will be replaced by finance director Nigel McNair Scott.
Deputy finance director Tim Murphy becomes finance director.
Fellow long-serving directors Antony Beevor and Wilf Weeks will also step down. They have been with the firm for 12 and seven years respectively.
Two new non-executive directors will also be appointed following the group’s AGM on 24 July.
Richard Gillingwater, dean of the Cass Business School, will become a senior independent director and a member of the nominations, audit and remuneration committees. Richard Grant, finance director at the Cadogan Estate, becomes chairman of the audit committee.
The group confirmed that chief executive of 26 years 64-year-old Mike Slade has committed to stay with the investment and development firm for a further five years.
The reshuffle was announced the same week as larger rivals Land Securities and British Land published annual reports for the year to 31 March.
Former LandSec boss Francis Salway took home £3m in his final year at the firm. This comprised £1.7m from the early vesting of shares when he retired, on top of his annual remuneration of £1.3m including a £481,000 bonus.
This compares with British Land chief executive Chris Grigg, who received a £1.9m total package, including more than £1m of incentives and benefits.