Prior to South Carolina, he spent a four-year stint at Arkansas from 2001-04, including the last three years as the defensive coordinator. He also coached the secondary, free safeties, cornerbacks and inside linebackers. The Razorbacks made appearances in the Independence Bowl (2003), Music City Bowl (2002) and Cotton Bowl (2001). Wommack's first of two stints at Southern Miss came during a seven-year span from 1994-2000, one of the most successful periods in Golden Eagle history. He was the defensive coordinator and assistant head coach in 1999 and 2000. He coached the outside linebackers in 2000, the middle and strong-side linebackers in 1999 and defensive backs from 1994-98.
Southern Miss was a founding member of Conference USA in 1996 and won three of the first four championships (1996, 1997 and 1999). The Golden Eagles made four straight bowl appearances from 1997-00, winning the 1997 and 1999 Liberty Bowls and the 2000 GMAC Bowl. All-Americans Cedric Scott and Leo Barnes were the defensive leaders.
As defensive coordinator, the 2000 defense finished second in the nation in total defense, eighth in scoring defense, fifth in pass defense and fourth in pass efficiency defense. The Golden Eagles collected an 8-4 record that season and won the GMAC Bowl, 28-21, over No. 13 TCU.
His 1999 defense was No. 7 in the nation in turnover margin and No. 8 in rushing defense, scoring defense and total defense. All-American Adalius Thomas and T.J. Slaughter were the defensive leaders. Southern Miss posted a 9-3 record that season, won its second C-USA title and won the Liberty Bowl, 23-17, over Colorado State. The 1998 Southern Miss squad ranked 18th nationally in scoring defense, finished with a 7-5 record and made an appearance in the Humanitarian Bowl.
The 1997 Golden Eagle squad posted a 9-3 record and won the second Conference USA championship. Southern Miss defeated Pitt, 41-7, in the Liberty Bowl, the first bowl game for the Golden Eagles since 1990. All-American cornerback and C-USA Defensive Player of the Year Patrick Surtain ranked 10th in the nation in interceptions and was drafted No. 44 in the NFL Draft. Defensive back Jamaal Alexander was a sixth-round pick.
The 1996 defense ranked No. 3 in turnover margin and No. 8 in rushing defense. Southern Miss ranked seventh nationally in interceptions with 18, led by Surtain. The Golden Eagles posted an 8-3 record and shared the conference title with Houston.