Where is he located? If it's the USA, especially Silicon Valley, then it's too late as he's too old. From what I read and comments from likes of Mark Zuckerberg the illegal practice of age discrimination is rampant.
If he's willing to learn .NET and move to Ireland then all is well as once he gets good experience older developers with technical ability are in big demand. As a 43 yr old .NET programmer said to me the other day (as we watched Ireland beat France in the Rugby) "We are the most employable people in this pub and I've never been in more demand in my life".