Yeah, I've come across them before. They bought a King Air I used to fly. See them pretty often on climbto350.
Their website says: "We routinely provide aircraft to accomplish a variety of missions including Intelligence, Surveillance and Reconnaissance; Airborne Data Acquisition; Fire Management; Aerial Application and Sterile Insect Technique. Customers include federal, state and local governments; non-profit research organizations and private corporations."
In terms of crews, the site says "Dynamic Aviation requires pilots with Beechcraft King Air 90 experience for precise all-weather flying at US and international locations. Assignments require travel away from home for up to 90 days at a time. Complex assignments, diverse customer requirements and varied flight conditions provide challenging and interesting work for talented and disciplined pilots.".
Read in between the lines, I'd say they operate in hot spots.