Chesterfield Royal Hospital have confirmed it's chief executive will be leaving the trust.
Simon Morritt has been in charge at the royal since 2016, but has been appointed the new boss of the York Teaching Hospital.
The Chesterfield Royal Hospital Trust's Chair Helen Phillips said in a statement to staff: "In what I think will be a somewhat unexpected announcement, I’m letting you know that our Chief Executive, Simon Morritt, will be leaving Chesterfield Royal Hospital NHS Foundation Trust.
"He’s been offered one of those often called ‘once in a lifetime chances’ - a career move to an area he knows well and has strong connections with, in a much larger organisation, with some very complex challenges to address.
"The position, as Chief Executive of York Teaching Hospitals NHS Foundation Trust, is a real opportunity for him and whilst the Board and I are saddened he’ll be moving on, we completely recognise that opportunity and wish him all the very best on this next step.
"And whilst when he told me I was instantly disappointed (I’d hoped we’d keep him for a while longer!) it is always pleasing when someone’s work and achievements are recognised. It illustrates that what we’re doing as an organisation has put us on the map.
"The Trust is in a very different place since he joined and has a very different mind-set. Simon’s leadership has contributed to creating an organisation that is well on its way to achieving ambitions that will place it where it wants to be - in the top 20% for both patient and staff experience.
"We now benchmark favourably with other hospitals and the value we place on our staff – thanks to recognition and reward initiatives, leadership development and health and wellbeing is a major culture shift that we can be proud of.
"We now have an impressive record of achievement, from the CQC rating, high levels of staff engagement in everything from the NHS staff survey to Flu Fighters; a real commitment to staff-led change and improvement through Listening into Action and the QSIR programme; and leadership principles through Leading the Chesterfield Way that are making a real impact.
"Added to which our record on national standards puts us in a very healthy position, with ED waiting times and referral to treatment times the envy of many other organisations.
"All this means that when we look to recruit a new Chief Executive, Chesterfield Royal Hospital NHS Foundation Trust is a really attractive proposition for someone that has considerable drive and ambition. We’ll be looking for an individual that can take us to our ultimate goal of achieving a CQC outstanding rating.
"It also goes without saying that we will want to find someone that will continue to focus on delivering on our promise to offer patients first-class care and treatment; and to give our staff places to work that they would be more than happy to recommend to family and friends, for both care and careers.
"I will keep you informed of the next steps in seeking a new Chief Executive and in the mean-time I am sure you will join me in congratulating Simon on all he has achieved here and in wishing him further success when he comes to take-up his new position."