Donald Menken

Donald Menken was the personal assistant of Oscorp founder, Norman Osborn.

The Amazing Spider-Man 2
Donald Menken was Norman's assistant and is an Oscorp Industries employee and possible board member. Menken seems to know something about Peter Parker as he had a suspicious face when he heard that Parker came to visit Harry Osborn. After Electro/ Max Dillion's accident, he tried to keep the whole thing as a secret. Later on at Oscorp Industries, he framed Harry, and fired him as he became the new CEO. Harry later returned to Oscorp with Max Dillion, who is now dubbed as Electro, and threatened Menken to take him to Special Projects. There, Menken showed him the spider venom. He told Harry that the serum won't work, but Harry refuses to listen and tells him to inject it in him. Harry soon starts transforming into the Green Goblin. During his transformation, Donald alerts Oscorp and escapes, he is no longer seen after these events.

The Amazing Spider-Man 2 (video game)
Spider-Man first meets him when he rescued him from Carnage's infected prisoners and after he is rescued he tells Spider-Man about Cletus Kasady being the one who infected the prisoners. Later on in the after credits scene he shows up after the Kingpin's phone call and its revealed that the Donald Menken Spider-Man met is the Chameleon and not the real Menken.

Trivia

 * A deleted scene from The Amazing Spider-Man 2 saw Harry Osborn kill Donald as the Green Goblin, similar to a deleted scene in The Amazing Spider-Man where The Lizard kills Rajit Ratha.