Phil Verster is leaving his post as managing director of ScotRail Alliance to take up the same role of the East West rail project.
The weaker pound was cited as a major factor in record numbers of North American visitors jetting to Scotland last year.
Scottish manufacturing is facing the brightest future in a cautiously optimistic outlook for a range of businesses north of the Border.
Almost half of Scotland's pubs, clubs and small hotels reported declining sales during the festive season, according to a survey by the trade body.
Scotland’s economy still lags behind the rest of the UK, according to the latest Gross Domestic Product (GDP) figures.
Scottish retail sales increased by 4.3% on a like-for-like basis in December, but the industry's representative body warned of troubles ahead.
The parent group of Arbroath smoked fish producer RR Spink and Sons has plunged further into the red.
The Insights Group, the Dundee-based people development organisation, saw its overall pre-tax profit rise by 19% to £5.9 million last year.
Perth-based builders group A & J Stephen celebrated a good performance last year with positive growth and increased profitability.
Fife-based Briggs Marine Ltd, which operates the Woolwich ferry across the Thames in London, reported "a satisfactory year of trading" in a variable economic climate