The plan first hired the firm in 2018.
The retirement system also made several changes to its public equity and real estate portfolios last week.
The last record was previously set at $23.6 trillion in 2021.
The retirement system approved a real estate commitment with an existing manager relationship in July.
The board recently made private equity commitments totaling $60 million.
The new hire will oversee the firm’s portfolio support group and lead its value creation initiatives.
The retirement system will also consider several changes to its public equity and real estate portfolios this week.
The new chief commercial officer succeeds Adam Spector, who is now ceo of Fiduciary Trust International.
The county may hire one or more firms in the search.
The new president of fixed-income will be responsible for the strategic direction of SLC Management’s global fixed-income platform.