Woodward said Johnson, who was voted by official Zurich Premiership website users as their man of the match against Georgia, was doing an outstanding job in preparing their side for the challenge of the Springboks.
"He is a tremendous man, people forget he is a world class player, his playing ability is outstanding, he is the best lock in the world bar none. His captaincy is just fantastic and what everybody likes about him, is that he doesn't talk a great deal but when he does, everyone just shuts up and listens," Woodward told www.zurichpremiership.com.
"He has probably spoken more this week than I have ever heard because he knows how important this game is. He is doing an outstanding job and he is on top of his game and I am just very lucky to have him. He is a good guy to work with and you just know that wherever he is behind the scenes he is saying the right things to the players and that it a massive thing.
"When you have a player so on side with what we are doing as a coaching team he never lets us down in that respect, in how we are approaching things, and once we have discussed things with him that's it. His famous words are 'lets get on with it and that's his attitude, he just gets straight into things all of the time."
Johnson will captain England for the 41st time in international rugby when he leads his side out on Saturday and is England's third most capped player of all-time behind Rory Underwood and Jason Leonard.