I'm sure this has since been settled, but I remember looking at this thread when deciding on King's. Especially for the aspect of "what kind of jobs can you get?".
What you put into your time at King's is what you'll get out. You need to be able to go out on your own and actively search for opportunities and internships. Whilst King's will hold networking events & help with CV's and applications, no one will go out and get you one.
I managed to get one in Parliament in my first summer by directly contacting that MP's office and playing to their specialism in the security sector.
From the Prime Minister of Jordan to the Force Commander of the UN mission in Liberia, it is apparent that the bulk of notable War Studies alumni occupy the upper realms of the military and wider security domain. WS graduates have gone on to occupy the following positions in the British Armed Forces, to name a few:
Deputy Supreme Allied Commander Europe
Deputy Chief of the Defence Staff
Director Special Forces
Commander Land Forces
Commandant General Royal Marines
Standing Joint Force Commander
Commander Allied Rapid Reaction Corps
Commandant of Royal Military Academy Sandhurst (Officer Academy for the British Army)
In terms of wider British political positions, they have been:
Private Secretary to Queen Elizabeth II
FCO’s Director for Eastern Europe and Central Asia
British Ambassadors to Slovenia, Sweden, Georgia, and Ukraine to name a few
Governor of the Turks and Caicos Islands
Parliamentary Private Secretary to the Foreign Secretary
Senior Advisor Middle East at the Ministry of Defence
Shadow Minister for Defence
Members of Parliament
Members of the European Parliament
Civil Servants at the: Cabinet Office, FCO, MOD, Parliament, etc.
As for international alumni, they have held positions of:
Prime Minister of Jordan
Prime Minister of Moldova
UN Special Coordinator for the Middle East Peace Process
Speaker of Parliament of Singapore
Chief of the Malaysian Army
Military Secretary of the Indian Army
Chief of the Defence Staff of the Nigerian Armed Forces
Permanent Representative to NATO
Deputy Commissioner for Counterterrorism at NYPD
US Assistant Secretary of State for Political-Military Affairs
US Assistant Secretary of State for Arms Control, Verification, and Compliance
In the private sphere, the department is a big feeder to the industries of cyber security, risk analysis, defence consulting, intelligence, and journalism. Some students go on to more generic consulting work and others transfer to legal professions. The department opens a number of niche doors and provides certain connections, but it certainly doesn’t close any doors to the wider corporate world.
Bear in mind that this isn’t the alumni of a university, this is a selection of some of the alumni of a small department. It doesn’t include any academics or professors at the department, who have been/are:
Chiefs of MI6, GCHQ, and the Joint Intelligence Committee
Permanent Representatives to the UN
NATO spokespersons
Chief Scientist of the Senate Foreign Relations Committee
Secretary of State in the German Federal Ministry of Defence
Professors at Oxford, Cambridge, Harvard, Yale, Georgetown, UC Berkeley, Columbia, Sorbonne, Sciences Po, etc.