 Pari gbolohun ti o tẹle: A pe Loeffel si ẹgbẹ orilẹ-ede Switzerland labẹ ọdun 18 fun awọn 2008 IIHF World U18 Championships ni Russia. O gba assist kan ninu awọn ere 6, pẹlu Switzerland ti o pari 8th ninu idije naa. Loeffel tun jẹ orukọ si ẹgbẹ fun 2009 IIHF World U18 Championships ni Amẹrika nibi ti o ti fi 4 ṣe iranlọwọ ni awọn ere 6, ti o tun pari 8th ni idije pẹlu Switzerland. Ni ọdun kanna o tun darukọ si ẹgbẹ Switzerland labẹ 20 fun 2009 World Junior Ice Hockey Championships  Division I ni Switzerland. O ṣe awọn ere 5 lati ṣe iranlọwọ fun Switzerland lati ṣẹgun idije naa ati ki o gba igbega fun 2010 World Junior Ice Hockey Championships ninu eyiti ko kopa, ṣugbọn o yan lati kopa ninu idije naa. : Ilé Ìṣọ ti ọdún 2011 lórílẹ-èdè Amẹríkà. Loeffel gba góòlù kan, ó sì ran Switzerland lọwọ láti parí ipò karùn-ún nínú ìdíje náà. 