D.C. Science Writers Association (DCSWA)

"With around 500 members, DCSWA is the largest independent regional science writing association in the country. Founded in 1987, its members include writers and editors from nearly all the major news outlets in the Washington, D.C. area, public information officers from agencies and institutions, and freelancers." "Much of DCSWA’s activity focuses around events that bring science writers and communicators together for socializing, networking and professional development. Our biggest event is our annual Professional Development Day, typically held in early April or late March."