Citation II S2/Bravo (C550)
Air Traffic Control Fully Certified
Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
A BE20 was on the ILS to Runway 4 on 2 mile final in VMC conditions. The Ground Controller had only been on position a few minutes. Ground Control issued taxi instructions to the pilot of a C550;'Runway 30L taxi via E and Runway 4.'  As the C550 was turning onto Runway 4 at taxi E the Ground Controller asked me what runway we were on? I said Runway 4. He immediately told the pilot of the C550 to cross Runway 4 at E and taxi to Runway 4. The BE20 was on a 2 mile final. I was standing up facing the runway and scanning; because it was VMC I feel like I would have caught the incursion and taken appropriate action. If it had been low visibility the 2 aircraft would have hit on the runway. This is the second occurrence with this Controller in the last few weeks. There seems to be a lack of awareness on this Controller's part that has to be addressed.
Tower Controller observed the Ground Controller utilize an active runway for taxi without securing approval from the Local Controller; the reporter questioning the Ground Controller's vigilance.