Nanofabricated quantum bits permit large-scale integration but usually suffer from short coherence times due to interactions with their solid-state environment [1].The outstanding challenge is to engineer the environment so that it minimally affects the qubit,but still allows qubit control and scalability.Here we demonstrate a long-lived single-electron spin qubit in a Si/SiGe quantum dot with all-electrical two-axis control.The spin is driven by resonant microwave electric fields in a transverse magnetic field gradient from a local micromagnet [2],and the spin state is read out in single-shot mode [3].