The Library of Congress has three positions available in Washington, D.C. Full vacancy announcements at USAJOBS.gov.

Job Title:Librarian (Preservation Specialist)
Agency:Library of Congress
Job Announcement Number:140308
Salary Range: $52,668.00 to $68,465.00 / Per Year
Open Period:Tuesday, June 16, 2015 to Tuesday, June 30, 2015

https://www.usajobs.gov/GetJob/ViewDetails/407169900

This Librarian serves as a preservation specialist in the Preservation Directorate of Library Services. The Librarian uses expert knowledge and skills to undertake preservation research to preserve the Library’s rarest, most valuable, and heavily accessed art, books, manuscripts, photographs, recorded sound, moving image, and other special media collections.

Job Title:Librarian (Manuscript – Historian)
Agency:Library of Congress
Job Announcement Number:150142
Salary Range:$90,823.00 to $118,069.00 / Per Year
Open Period: Friday, June 12, 2015 to Monday, July 13, 2015

https://www.usajobs.gov/GetJob/ViewDetails/406842800

The Librarian (Manuscript Historian Specialist) position has primary curatorial and acquisition responsibilities for the political, military, and legal collections of the Manuscript Division that fall in the modern period, roughly from 1900 to the present. Included in this time frame are hundreds of collections, notably the papers of Presidents Theodore Roosevelt, William Howard Taft, Woodrow Wilson, and Calvin Coolidge as well as cabinet members from those and subsequent administrations; dozens of members of Congress; Supreme Court Justices; journalists and publishers; military officers and defense secretaries; diplomats and foreign intelligence officers; and countless other American luminaries. The Manuscript Division is one of the foremost special collections repositories of the world. The specialist works under the general supervision of the chief of the Manuscript Division, who provides guidance concerning the general scope, direction, and objective of assignments. This position is located in the Manuscript Division of Library Services.

Job Title:Librarian (Reference Librarian)
Agency:Library of Congress
Job Announcement Number:150026
Salary Range:$52,668.00 to $68,465.00 / Per Year
Open Period:Tuesday, June 9, 2015 to Monday, July 6, 2015

https://www.usajobs.gov/GetJob/ViewDetails/406371900

The Reference Librarian provides assistance to researchers in the culture, history, literature, politics, political structure, economies, humanities, and social sciences of the assigned countries and regions in the Asian Division. Clients include Congress, foreign and US Government agencies, national and international scholars, research and scientific institutitons, the professional and business communities, and the general public. Librarians respond to inquiries that are received in person, by telephone, by correspondence and by electronic media. Librarians recommend items for acquisition.