Someone who multitasks, who performs multiple tasks at the same time.(noun)
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Use "multitasker" in a sentence
"The 69-year-old multitasker is always on the lookout for appropriate roles in between his duties as head of the Los Angeles Opera (where this is his fourth mainstage commission) and the Washington National Opera (where his sole new commission was for the young-artist program)."
"EAR ABBY: My daughter insists that she's a "multitasker" - too busy to telephone or text except when she's driving."
"Dear Abby: My daughter insists that she's a "multitasker" - too busy to telephone or text except when she's driving."