Sherwood-Rogers, who could not be contacted to comment, posted the update on his LinkedIn home page.
It reads: “I am an experienced entrepreneurial managing director. Adept at creative thinking, strategy, marketing and innovation - and inspiring people to deliver.
“Over the past few years I have had the pleasure of building a great group of businesses and people, through acquisition and organic growth - many thanks to the team.
“Currently on gardening leave, I am pursuing some new ventures.”
Stephen Stout, chief executive of Landmark Information Group, said Sherwood-Rogers had left the company to explore other interests.
He added: “James has been a tremendous asset to the company and we wish him well in his future pursuits."
Stout confirmed David Callcott, finance director of Landmark Information Group, will be acting managing director while the firm recruits a replacement for Sherwoood-Rogers.
Sherwood-Rogers held the role of managing director of Landmark UK Property Group, which owns Quest, from October 2003.
He also chairs the Council of Property Search Organisations which provides a professional voice for companies producing property search reports.
His profile page lists his specialities as strategy, acquisition, innovation, marketing, technology, data, property, internet and eating biscuits.
Last summer Quest predicted that all valuations would be online by December 2012, helping to reduce lenders’ and valuers’ risk.
In June 2011 it revealed it was in the process of developing a software system that will mean surveyors could draw floorplans and fill out every valuation in full on a tablet computer they take to the property.
