Defence, aerospace and energy manufacturing firm Senior has poached Cobham's chief operating officer (COO) as its new chief executive officer (CEO), replacing Mark Rollins who is due to step down after 17 years with the group.Cobham COO David Squires will join the board on 1 May and will take over from Rollins on 1 June after the latter announced last August that he would be retiring from a full-time executive career.Rollins has spent 15 years on the board, initially as group finance director, and has been running as CEO for the last seven years."David clearly has the depth and breadth of experience, and the personality and drive to lead Senior through the next stage of its development," said Senior's chairman Charles Berry."In particular, his 25 years of experience in the global aerospace and defence industry, working in both developing and larger organisations, will be a significant benefit to Senior as it grows and increases its profile with its customers."