This week, National Geographic is hiring a communications and new media manager, while HarperCollins is on the hunt for a senior publicist. Joonbug is seeking a marketing and events manager, and Bauer Publishing is on the hunt for a senior PR manager. Get the scoop on these openings and more below, and find additional just-posted gigs on Mediabistro.

• Communications & New Media Manager National Geographic (Washington, DC)
• Senior Publicist HarperCollins (New York, NY)
• Marketing & Events Manager Joonbug (New York, NY)
• Senior PR Manager Bauer Publishing (Englewood Cliffs, NJ)
• Director of Marketing MedStar Georgetown University Hospital (Washington, DC)

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