How long will it take before Mike Tomlin finally fills the voids on his coaching staff?

The quick overview of Danny Smith is that he has been the special teams coordinator for the Washington Redskins since 2004, prior to which he had stints with the Bills, Lions, and Eagles in various capacities. Smith's bio on Redskins.com has plenty of positive things to say about him, including:

In 2011, Smith's special teams unit ranked first in the NFC in kick return average allowed (20.8 yards) for the second consecutive season. Additionally, the unit ranked fifth in the NFC in opponents' average starting position (21.8-yard line on kickoffs).

He also helped Brandon Banks become one of the league's most consistent return specialists. Banks finished the season with career highs in kick returns and kick return yards with 51 kick returns for 1,174 yards, which led the NFL in both categories....

In 2010, Smith's unit ranked first in the NFC in kick return average allowed (19.0 yards) and second in the NFC in opponents' average starting position (23.7-yard line on kickoffs).