Ireland 1500m runner Ciara Mageean is moving to the UK to join Manchester-based Team New Balance.
The move will see Mageean link up with coach Steve Vernon, with the 25-year-old making the switch in late November.
As a result, the 2016 European Championship bronze medalist will split from her coach Jerry Kiernan.
"Jerry took me on before my ankle surgery and helped me on my journey of recovery," Mageean said in a statement announcing the news.
"He gave me the confidence to know that I’m as good as any athlete in the world. I have always counted Jerry as a friend as much as a coach."
2018 will see Mageean look to race at both the Commonwealth Games in April and the European Championships in Berlin in August.
"I am confident that Manchester is the right place for me, at this point in my running career," she added.
"The change of environment and having a professional team around me day in day out is what I need to make the sort of progress that I want to, to be more consistent and to deliver the results I know I am capable of, especially when I pull on my Irish vest. That is what is most important to me, running for Ireland and representing my country, my family, my friends and myself."
Ninety-nine per cent of us will never run a marathon, 26.2 miles is a trip too far for most, but last Sunday, a record 20,000 runners, joggers and walkers assembled around Merrion Square for the start of the 2018 Dublin City Marathon, the fifth largest event of its type in Europe.