Atlas Master Trust has appointed Schroders as one of its investment managers to develop the provider's default fund proposition.
Schroders will design and manage a range of multi-asset funds that will underpin Atlas' default investment strategy.
Capita Employee Benefits, which launched Atlas in 2015, will continue to administer the scheme.
Atlas Master Trust chairman Alan Whalley said: "We are excited to be working with Schroders, who have an outstanding and globally respected pedigree as investment managers, as we seek to strengthen Atlas' investment strategy and the governance around it, making it the UK's stand-out master trust of choice.
"It is crucial that the trustees of any master trust continually review their strategy and proactively seek to improve member outcomes."
Schroders head of UK institutional DC Tim Horne added: "Atlas has grown rapidly since 2015 and we are excited to further help grow what has been a great success story in the DC space. The UK's master trust market is poised for substantial growth and Schroders is well-placed to bring investment excellence to Atlas members."
In May, Atlas appointed Paul Trickett as an independent chairman of the master trust's sub-committee to lead the delivery of the investment strategy.
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