From July, Challinor will work across the company and be responsible for delivering a revenue stream for the Telegraph's mobile offering.
He will focus on reader and advertiser interactions, database opportunities, content distribution and new revenue-generating opportunities.
The mass adoption of smart phones such as the iPhone and BlackBerry is fuelling new opportunities surrounding mobile phones.
In the UK alone, mobile advertising spend is expected to experience near 40% compound growth this year and increase from $111m in 2009 to $524m in 2014, according to the latest PwC forecast.
Challinor will report to Steve McLaughlin, executive director of Consumer Revenues at TMG.
McLaughlin said: "He brings more than 20 years' newspaper experience to the role, including two years as European president of the Independent Newspaper Marketing Association, between 2004 and 2006."
McLaughlin called the experienced press marketer "a great asset" and stressed: "TMG's mobile offering goes from strength to strength. Our World Cup app, for example, has had over 300,000 downloads."
Prior to starting his own consultancy business in 2006, Challinor was group promotional marketing manager at Associated.
During the 1990s, he also held a number of commercial roles at Trinity Mirror. He has also worked as a consultant with The Times of India, Sydney Morning Herald and the American Marketing Association.