From TARDIS Index File, the free Doctor Who reference.

Diana Goddard
Also known as:
Race:	Human
Home Planet:	Earth
Home Era:	2012
Appearances:	DW: Dalek
Actor:	Anna-Louise Plowman

Diana Goddard (usually just called Goddard) was the highly efficent and ruthless personal assistant to Henry van Statten. Over the course of just one day, her career path went from replacing the old assistant to taking over GeoComTex, van Statten's company.

Goddard had a sardonic sense of humor, much like her employer. She found the Democratic Party "funny" and hoped that they would win the next Presidential election, an event over which van Statten implied he had control.

Goddard told the Doctor to "shut it" before recognizing him as an ally. Van Statten accorded her a rare degree of respect. After the Doctor and Rose Tyler had destroyed the Dalek let loose in the Vault, Goddard orchestrated a corporate palace coup of sorts and took over from van Statten, demonstrating her ruthlessness by ordering his memory wiped and her former boss dumped on a street corner in some city starting with the letter "S". (DW: Dalek)