 Prior to signing with BSV, he had trialled in friendly matches during the summer, where he had left a good impression.In August 2013, after three years at BSV, Geertsen signed a six-month contract with HB Køge.He made his official debut for the club on 27 August as a starter in a 3–1 Danish Cup away win over Ledøje-Smørum, with Geertsen scoring the second goal for HB Køge.