She studied physical education at Dokuz Eylül University in İzmir, and became a school teacher.
[1] In 2000, Tosun Ayer received her FIFA badget to officiate international football matches.
[3] On July 16, 2006, she oversaw the group stage match between the women's national teams of Sweden and Denmark in Langenthal, Switzerland.
Another Women's World Cup qualification match she officiated was the game between Hungary and Bosnia and Herzegovina in Sopron, Croatia on March 31, 2010.
She served as referee at the UEFA Women's Euro 2013 qualifying round matches for the Group 1 game Greece against Macedonia in Athens, Greece on April 4, 2012[8] and for the Group 3 game Hungary Bulgaria in Sopron, Croatia on September 19, 2012.