Former Scotland captain Kelly Brown will finish his playing days at the end of the season and take up a role as Saracens' academy coach.
The 34-year-old back-row forward won 64 caps for his country and was skipper 14 times.
Brown has won three Premiership titles, the Champions Cup and Anglo-Welsh Cup since joining Sarries from Glasgow Warriors in 2010.
He could retire on a high note, with the London club in the last four of Europe's premier club competition and in the hunt to retain their Premiership title.
He said: "I always knew this day would come and it seems like only yesterday I was pulling on the black and yellow of Melrose as an 18-year old student.
"Since then I've been hugely fortunate to play the game I love at the highest level for the Border Reivers, Glasgow Warriors, Saracens and Scotland.
"Along the way, I've met some great people who I can now call friends for life. I have played for four clubs who I care deeply about and to have been able to captain my country is an honour that I'll always cherish."
He added: "I'm forever grateful to be ending my career at a fantastic club like Saracens. Their support for my family and me has been unstinting and I'm extremely excited to be moving into a new role within the club's academy next season.
"I've been lucky to have been able to live my dream for 13 years and now I'm privileged to be able to help others do the same."