KEEP Scotland Beautiful has become embroiled in nepotism allegations after the chief executive's wife landed a top job at the publicly funded environmental charity.

Catherine Gee was appointed "head of corporate services" at Keep Scotland Beautiful (KSB) without the post being externally advertised, months after her husband became the charity's CEO. She was the only person to apply for the job.

SNP MSP John Wilson said the appointment raised "serious issues" for the charity.

KSB has a key role in helping reduce Scotland's carbon footprint, particularly in giving a lead on anti-litter strategies.

The charity also administers the Scottish Government's Climate Challenge Fund and has recently launched a new campaign to "clean up" the country.

In 2011, KSB had income of £16.6m, about £15.3m of which came from Government funding. It is now facing questions about its hiring practices.

In March last year, Derek Robertson was unveiled as the organisation's new chief executive.

He brought 20 years of senior management experience to the role, including CEO positions at other charities.

Months after he took up the post, Robertson's wife Catherine was given a temporary contract at the charity as a "change manager".

At the end of 2011, the chief executive and another senior member of staff, John Frater, decided to restructure KSB's senior management, changes that included a new head of corporate services.

The post was only advertised internally and Gee was given the job, which attracts a salary of up to £45,000 a year and is one of the charity's four "executive team" positions. Robertson earns up to £70,000 a year.

Speaking to the Sunday Herald, Frater said that although he and Derek Robertson planned the new management structure, the CEO played no role in the recruitment of his wife.

On not advertising the job publicly, Frater said: "We normally do things internally first and externally thereafter, if we are unable to fill."

Asked how many internal staff had applied for the post, Frater said: "One. Just her."

The married couple have been linked to other environmental organisations in the past.

In 2009, both were directors of The Green Academy Ltd, posts that have since ceased to exist.

They are also listed as directors of Give Green Limited, a firm incorporated in 2010 but which is described as "non-trading".

Gee's online biography states that her executive position focuses on "organisational development and change management".

Her early career was in business management within the legal profession, after which she switched to the third sector.

Wilson said: "The decision by Keep Scotland Beautiful to give a permanent post to the chief executive's wife raises serious issues of nepotism.

"As the main funder of Keep Scotland Beautiful, the Scottish Government should be calling for an immediate response from the charity. No Government-funded body should be exempt from scrutiny of its recruitment policy, particularly during a recession."

Labour MP Graeme Morrice said: "Given that KSB relies on millions of pounds of public money, its recruitment processes have to be seen to be open and not tainted by any perception of favouritism. I am disappointed this post was not externally advertised and SNP ministers should be seeking answers about this appointment."

In a statement, Frater said: "Following a recruitment process using the charity's standard practices, Keep Scotland Beautiful was very fortunate to be able to secure the services of Catherine Gee as its head of corporate services. The chief executive played no part in the selection process, which was undertaken by a charity trustee and the company secretary."