The secondary coach in football is the coach in charge of all of the players who make up the secondary on defense including cornerbacks and safeties. He works closely with the defensive backs on different aspects of the game.
One of the main drills that the secondary coach runs for players during practices is passing coverage. The coach will present the defensive line with different types of offensive scenarios that they have to counter. This allows the defense to be familiar with any type of offensive formation they might see during a game.
The defensive line needs just as much talented footwork as the offensive line! The secondary coach can work on the player's footwork, since defensive backs need to have fast footwork to navigate an offensive player's moves quickly.
Secondary coaches also train these players on making defensive recoveries. Oftentimes in game, an interception can happen in an instant. Because of this, the defensive backs need to make quick adjustments and literally "recover" and get back on defense. Defensive backs rely on their coach to give them strategies to make quick and effective recoveries and how to span and cover the field in any intense game situations.