Jeff Jimerson is a Pittsburgh-based singer, best known as the national anthem singer for the Pittsburgh Penguins for over two decades. He also performs with Airborne, a Pittsburgh-based band.

Based on this passage, who sings the national anthem for the pittsburgh penguins? Let's give stream of consciousness first:
To answer the question, consider the following: Jeff Jimerson is a Pittsburgh-based singer, best known as the national anthem singer for the Pittsburgh Penguins for over two decades.
So, the final answer is Jeff Jimerson.