Here's a reel with some of the commercial animation compositing that I've worked on. Everything here was done with Nuke or After Effects.

Compositing is done at the end of the pipeline, and involves combining the various elements into the final image, adding effects (such as grain or motion blur), and generally making it all look pretty.

Projects breakdown:

Telstra Summer Mountain // Mighty Nice // Directed by Robertino Zambrano

Motorola Unlocked 'Send Me To Hello' // Mighty Nice // Directed by Alice Dupré
// compositing lead Vincent Sousa

Volkswagen 'Ta Da!' and 'School Run' // Mighty Nice // Directed by Alex Weight
// compositing lead Vincent Sousa

HBO Chinese New Year Ident // Mighty Nice // Directed by Vincent Sousa

Toilet Duck TVCs // Mighty Nice // Directed by Darren Price
// compositing with Kallie Ennever and Fiona Lu

CHVRCHES 'Bury It' (music video) // Mighty Nice // Directed by Darren Price
// compositing lead Vincent Sousa

1to38 - The Jarryd Haynes Story (documentary titles) // Candid Films