Mezue ahịrịokwu na-esonụ: Site na 1974 ruo 1976, e zigara ya na Mission nke Canada na European Community na Brussels. Site na 1982 ruo 1986, ọ bụ onye ndụmọdụ na onye nnọchi anya Kọmitii Enyemaka Mmepe maka Organizationtù Maka Mmekọrịta na Mmepe na Paris. Site na 1989 ruo 1992, ọ bụ onye nnọchi anya na Cameroon, Chad na Central African Republic. Site na 1993 ruo 1996, ọ bụ onye nnọchi anya na Poland na, site na 1996 ruo 1999, na Russia, Armenia, Uzbekistan na Belarus. Leahy bụ Federal Coordinator maka
Ụbọchị Ndị Ntorobịa Ụwa 2002. Site na 2004 ruo 2007, ọ bụ onye nnọchi anya na mpaghara Great Lakes nke Africa. Ọ bụ onye isi oche nke ndị enyi nke Great Lakes nke International Conference for Peace, Stability and Development in the Great Lakes Region. Site na 2008 ruo 2012, ọ bụ onye nnọchi anya Canada na Holy See na Rome. Mgbe ọ lara ezumike nká, a họpụtara ya onye nhazi mgbanwe nke Pope maka Ngalaba nke Mba Ndị Ọzọ nke Canada na 2013.