Sir Keir Starmer's former chief of staff is one of four new members of the senate at Queen's University Belfast.
As the PM marks a year in office next week - which he will spend grappling with crises - British politics finds itself at an inflection point
Watch: Don't call civil servants 'pen-pushers', says Sue Gray
Former Partygate investigator who went on to become Sir Keir Starmer's chief of staff joins the Lords.
Sue Gray will join the House of Lords two months after she left her role as the PM's chief of staff.
The PM's former chief of staff is expected to be among a raft of new peers announced on Thursday.
The senior official was initially appointed to the role after departing as the PM's chief of staff.
The government has confirmed Sue Gray will not take up her post as the PM's envoy to the nations and regions.
The prime minister's ex-chief of staff will not immediately take up a new role as his regional envoy.