"Embarked on his coaching career at his alma mater as defensive tackles coach at his alma mater in 1995, beginning a decade-long run that also saw him coach outside linebackers (1996-99) and defensive backs (2000)."

If he was the DB coach at So. Miss, then how does that make him a lifetime DL coach? Then again, I am still having a hard time figure out why you think Nix is a "lifetime DL coach" when his resume doesn't support it.

1995 Southern Miss (DT)
1996–1999 Southern Miss (OLB)
2000 Southern Miss (DB)
2001–2004 Southern Miss (DC/ILB)
2005 South Carolina (co-DC/DL)
2006 South Carolina (co-DC/LB)
2007 South Carolina (co-DC/ILB)
2008–2009 Ole Miss (DC/LB)
2010–2011 Ole Miss (AHC/DC/LB)
2012–2014 Middle Tennessee (co-DC/LB)
2015–2016 Middle Tennessee (DC/LB)
2017 Texas A&M (defensive analyst)
2018–present Virginia Tech (S)