Holmes guided his newly promoted team to three wins and two draws as they had an unbeaten start to the season.
City averaged two goals per game as they registered wins against established Blue Square Premier sides Ebbsfleet United, Crawley Town and Woking.
The award was judged by a panel of experts including Setanta commentator Paul Parker.
Parker had this to say about Holmes: "Salisbury surprised a lot of people with their fantastic start to the season, they have shown that they can cope with the step up to this level."
Source: http://www.confguide.com/newsArticle.do?id=6987