After a promising spell at Brentford, the 53-year-old was appointed at Ibrox last summer and has gone on to enjoy a stunning first campaign with the Gers.
Promotion to the Scottish Premiership was swiftly followed by the club's first ever Challenge Cup triumph, while the upcoming Scottish Cup final will present the Englishman with the chance to clinch the treble as well as a spot in next year's Europa League.
So with life at Ibrox looking a lot brighter than it has done at any other time in recent years, Henderson stated that Warburton's success leaves him with just one concern.
“The team are very, very fit, and both Mark and David are obviously very, very professional. They have done a great job, and if I have a worry, then it would be keeping him," he told the club's official website.
With the Gers going into this campaign as favourites for the Scottish Championship title, it is perhaps fair to say that a true indication of how good a job Warburton has done will come next term when the side return to the top flight.
Though they have done fantastically well in the cup competitions and have beaten Premiership sides on three occasions - most notably, against Celtic in the Scottish Cup semi-final - it remains to be seen how they will get on coming up against a better standard of opposition week-in week-out.
Should they rise to that challenge in the way they have risen to every challenge this season, then Henderson's worst fear may be realised as it will surely become much more difficult for Rangers to hold onto their manager.