Sept 16 (Reuters) - Professional services provider JTC JTC.L said on Monday it has agreed to buy Citigroup's C.N global fiduciary and trust administration services business for $80 million.

The unit 'Citi Trust' serves over 2,000 ultra-high net worth clients across seven jurisdictions, including New York, Delaware, Singapore and Switzerland, managing more than $70 billion in assets.

The sale follows Citi CEO Jane Fraser's sweeping overhaul to improve the bank's performance, reduce costs and simplify its operations. The lender in recent years has divested from multiple international retail banking businesses and closed its municipal securities business.

London-listed JTC expects the deal will expand its U.S. footprint. After the transaction closes, it will have over 420 employees across eight U.S. cities.

Fiduciary and trust administration services involve managing assets on behalf of clients, typically catering to high-net-worth individuals, families, businesses, and charitable organizations.

Citi first disclosed in August it had initiated the process to sell the business.

(Reporting by Manya Saini in Bengaluru; Editing by Vijay Kishore)

((Manya.Saini@thomsonreuters.com; X: manya__saini;))