Control services are provided by Williams Tower / Approach (Willie Tower), and by McMurdo Center (Mac Center) when the tower is closed. The McMurdo Weather Office provides weather forecasting for Williams Field while onsite Controllers and Weather Observers provide hourly and special weather observations.

Aviation fuel at Williams Field is pumped in a 16 km (10 mi) flexible pipe from McMurdo Station. Fuel is stored in up to 12 tanks. The fuel tanks, like other structures at the airfield, are mounted on skis or runners for portability.