He has been a member of The Suicide File, A Static Lullaby, Dead Country and more recently, My Chemical Romance, Alkaline Trio, Matt Skiba, Meg Myers and Necessary Noise.

[2] Alexander has continued to play with My Chemical Romance into 2012, including their appearances on the Australian Big Day Out tour dates and their final show at Bamboozle Festival.

He's also contributed to My Chemical Romance members Gerard Way, Ray Toro and Frank Iero's respective solo projects, after the breakup of the band.

Despite Alexander's tenure with My Chemical Romance, it has been acknowledged that the band has not had a full time drummer since Bob Bryar's departure in 2010.

Drums: Gretsch Drumheads: Remo: Cymbals: Istanbul Agop: Drumsticks: Vic Firth: Pedals/hardware: Ludwig: with Matt Skiba & The Sekrets * The Sharpest Lives – MCR Announces New Touring Drummer September 4, 2011