Citationjet (C525/C526) - CJ I / II / III / IV
Air Traffic Control Fully Certified
A Global Express was issued a descent to cross GOUDA intersection at 16;000. About 20 miles from GOUDA; I terminated RADAR service and advised the aircraft to contact Juliana Approach. Because my scope was saturated with data tags; and I wanted to eliminate the potential for distractions; I dropped the flights data tag while still in my airspace. A Citationjet; a departure from Princess Juliana (SXM); was RADAR identified East of GOUDA at 14;000. With only a quick glance to see if there were any potential conflicts; I climbed the aircraft to FL400. After a few second; while scanning the area around the Citationjet; I noticed that he had traffic northwest of his position at 16;000. I immediately turned the aircraft south to avoid. Separation did not drop below 5 miles; but that was pure luck. As soon as the situation was resolved; I turned the Citationjet on course without further incident. Recommendation; if I had only kept the Global Express's data tag; and took a few extra seconds to ensure that there were no conflicts to the Citationjet; this incident would not have happened. But; because I was such hurry; I skipped my normal procedures and climbed the aircraft immediately. I let the pilots control me instead of the other way around.
ZSU Controller described a near loss of separation event when prematurely dropping a data block and then issuing conflicting climb instructions.