You're right to infer that it's related to taking on a different role, that of Strategic Operations Officer (That is essentially spelt out in the transcript others have provided) and that that role falls under the Command division. As @Valorum points out, the mere fact that the position contains the word operations doesn't make it an Operations role.
The word you should be concentrating is strategic. In some respects strategy is the defining feature of what Command does.
The terms tactic and strategy are often confused: tactics are the actual means used to gain an objective, while strategy is the overall campaign plan, which may involve complex operational patterns, activity, and decision-making that govern tactical execution.
That is not run of the mill Operations which essentially means the branch responsible for making things happen and keeping things running.
I would also note, the Operations in Strategic Operations may be in the sense of a military operation. In other words, he works on operations (actions) of a strategic kind (i.e. not strictly military). That may include actions of a Special Operations nature:
Special operations (S.O.) are military operations that are "special" or unconventional and carried out by dedicated special forces and other special operations forces units using unconventional methods and resources. Special operations may be performed independently of or in conjunction with, conventional military operations. The primary goal is to achieve a political or military objective where a conventional force requirement does not exist or might adversely affect the overall strategic outcome. Special operations are usually conducted in a low-profile manner that aims to achieve the advantages of speed, surprise, and violence of action against an unsuspecting target. Special ops are typically carried out with limited numbers of highly trained personnel that are adaptable, self-reliant and able to operate in all environments, and able to use unconventional combat skills and equipment. Special operations are usually implemented through specific, tailored intelligence.
In fact, on a number of occasions, we have specifically seen Worf involved in planning and executing special ops.