Since a Master's degree in International Relations is a broad one, as mentioned in the preceding question, it opens the doors to many career opportunities locally, abroad, in private or government entities or organizations.
Some of the roles graduates can apply to areas as an advisor (political, economic, financial, communication, diplomatic), strategist, researcher, analyst, consultant, ambassador, foreign service officer, intelligence officer, lobbyist, public administrator, professor, public speaker, public relations officer, author, business operations officer, operations officer of any organization, translator, non-uniformed military personnel or officer, politicians or chief of staff of politicians (especially those in higher office), a foreign news correspondent and many others.
Graduates can apply to state or federal offices, legislative offices locally and abroad, embassies, corporate organizations, think tanks, PR firms, research centers, communications firms, consulting firms, international organizations, international media outlets, even in military bases or offices, and universities among many other industries and sectors.