Intern in DoD and DoS, while in grad school
Chief of Staff to Deputy Secretary of State (DAS-level position)
Senior Foreign Service, Minister-Counselor (30 years, now retired)
Acting Deputy Chief of Mission at a U.S. mission overseas.
Ambassador/acting Assistant Secretary of Defense
Department Chair and Associate Professor (Excepted Service Schedule A)
Assistant Secretary of State and also as a Congressional Staff Director
Assistant Director in an office within the EOP
South America director on the National Security Council staff in the White House
civil service level management positions
Professional Staff Member, Senate Foreign Relations Committee
Deputy Assistant Secretary of State; Legislative Director in Congress
Senior Economist, Council of Economic Advisers
I have served in the federal government as an IPA, which is mechanism where I was treated (and performed duties) much like a civil servant, but I was on a contract and still employed by a non-profit organization outside of the government for salary and benefits.
Senior Advisor, U.S. Department of State
Senior Legislative Assistant in Congress.
Embassy Political Counselor, NATO Director at State
Director for Europe responsible for NATO at the NSC; Office Director for NATO at the State Department
Deputy Chief of Mission/Charge d'Affaires
Assistant Secretary of State (domestic) and ambassador (abroad...a real ambassador not honorific title)
speechwriter to Henry Kissinger as Secretary of State (worked with Charley Hill)
Independent USG agency (federal commission). Commissioner
assistant Secretary of State, US Ambassador
Special Assistant to senior officials at State Dept.
Foreign policy advisor to the Senate minority leader
senior adviser to Undersecretary of State, team leader for Joint Inquiry into 9/11(House and Senate Intelligence Committees)
special assistant to president, senior director White House
SES-4 Director of a Government Research Institute
Director, National Security Council staff
Senior Executive Service Captain, U.S.Navy
Office Director at the Department of State
Non-supervisory position in USG global communications
mid-grade civil servant for a short time
Chief of Staff in both the administration and on the hill
professional committee staff member (Senate)
congressional defense subcommittee staff director
Legislative Assistant to a United States Member of Congress
Legislative Assistant in a Member Office
Deputy Chief of Staff (Congressional Office)
Military Legislative Assistant in Congress
Assistant Secretary of State twice; Ambassador to a key foreign country once; Career Ambassador lifetime rank.

Twitter posts/comments from personalities like Tom Nichols from war college
Institute for Devevlopment Studies, Sussex; ;

Gary Sick's Gulf 2000 (G2K) message board - daily