Jarvis is being investigated over the fatal Potters Bar crash

Reports said Paris Moayedi will offer to resign from the job he took on six months ago at a meeting of Jarvis's board on Monday.

Former Tory MP Steve Norris, currently senior non-executive director at the Hertfordshire-based group, is likely to replace Mr Moayedi, reports added. A Jarvis spokesman was unavailable to comment on the claims.

But reports added the company is also likely to make an announcement in its interim results on Tuesday.

Mr Moayedi, who joined the firm as chief executive in 1994, has overseen the company's transformation from a traditional construction company to a contractor and Private Finance Initiative (PFI) specialist.

But recently the company has been dogged by controversy - thought to be one of the reasons behind Mr Moayedi's move.

'Reputational problems'

Earlier this month, Jarvis was been criticised for its handling of a �55m PFI scheme to build and maintain nine schools in Merseyside.

A BBC investigation discovered the project was delayed - leaving some of the schools unable to open on time because subcontractors were not paid.

In October, Jarvis pulled out of day-to-day maintenance on the rail network after criticism of its performance, citing "reputational problems" and lower than expected profits.

The firm is under investigation over its maintenance of the track at Potters Bar, where an accident claimed the lives of seven people last year.

Meanwhile, in September, it admitted that it could have been to blame for a derailment outside London's King's Cross, after its contractors removed a section of rail for repairs overnight, but then failed to replace it.