Like Stephen Kelly, Lee Barnard, Dean Marney and Ronnie Henry, 'Jacko' benefited from time away from the Lane.
Having done well during a three-month spell at Swindon Town early in the campaign, 'Jacko' returned before heading off to almost complete the season with Colchester United.
Although he returned just before the end of the League campaign due to a knee injury, Johnnie was pleased to have topped up his Nationwide know-how - which also included a game for Colchester against his 'former' club Swindon.
"I really enjoyed my time down there - I got some more league experience and played more games," reflected the midfielder who featured at left-back for the Layer Road outfit.
"It would have been nice to see the season out with them because I was meant to be there until the end, but I got injured.
"I was playing left back for the reserves here at the time, they didn't kid me and told me where I'd be playing. I thought I would give it go there in League football."
Jacko proved to have something of a galvanising effect of The Us who, after a sticky patch went on an eight-game unbeaten run - culminating in a 3-0 win over Division Two play-off winners Cardiff.
"I turned things round," he joked. I played eight games, we went on a really good run and didn't lose a game while I was there - won four, drew four.
"The new manager - Phil Parkinson - came in and has done really well. It's a shame we left it too late, if Colchester had played like that maybe six games before I got there we might have pushed for the play-offs."
So how did Colchester compare with his previous loan spell at Swindon?
"Obviously I was playing in a different position, but they are both in a similar league position and there is not a lot to choose between the two clubs.
"It was a different experience though, a new bunch of lads and two completely different managers - it is just nice to experience other things," he added, before admitting that facing them was somewhat strange.
"It was strange. I made some good friends while I was down at Swindon and playing against them was weird. It was nice to get the victory.
"We were at home so I didn't get too much stick. I had a couple of shots that didn't go to plan and I got a bit of abuse behind the goal."
Johnnie Jackson is another of our young professionals who only has good things to reflect on after a double dose of Football League experience last season.