Which fictional company employs the modern-day protagonist in Assassin's Creed IV: Black Flag?

Abstergo Entertainment employs the modern-day protagonist in Assassin's Creed IV: Black Flag. The company is a media subsidiary of Abstergo Industries that uses genetic memories to create entertainment products.

In the modern-day sections, the unnamed player character works at Abstergo Entertainment and explores the memories of Edward Kenway through the Animus. This framing device lets the company research the past while presenting its discoveries as commercial entertainment.

Abstergo Industries is the larger corporation and is therefore an understandable but less specific answer. Black Flag's fictional workplace is Abstergo Entertainment, not the real-world publisher Ubisoft. The modern-day story also introduces or develops characters connected to the wider Abstergo and Assassin conflict, while most of the gameplay takes place in Edward's eighteenth-century Caribbean memories.