Pedzisa mutsara unotevera: Pakuvamba kwa1962, Harrop akachinjirwa (pakukumbira kwaSheldon B. Vance) kuBureau of African Affairs, uko akanga ane mutoro wezvinhu zvemari muCongo (ipapo pakati peHondo Yemashoko
Dambudziko reCongo) uye kuparadzana kweKatanga. Muna 1963, Harrop akaenda kuBrussels kunova mukuru wepakati-giredhi rezvehupfumi uye mutevedzeri weEconomic and Financial Affairs Commission.