The robberies happened at the Citizens Bank branch inside the Acme store at 3210 Red Lion Road on Wednesday, July 18th and Sunday, July 22nd.
In both robberies, the suspect threatened a teller with a handgun, and fled the area of the bank on foot in an unknown direction after obtaining cash.
The wanted man is described as a white male in late 30's or 40's, 5'11" to 6'0" tall, 200 pounds, with close-cut hair.
In both robberies, the FBI said, he wore baseball caps, sunglasses, sleeveless t-shirts and shorts.
The man is considered to be armed and dangerous.
Anyone with information is asked to contact the Philadelphia Police Department or the FBI at 215-418-4000.
There may be a reward for information leading to the suspect's capture. Tipsters can remain anonymous.