Al Mannai assumed his current position in 2020. QICAM had $8 billion in assets under management in 2025. That year, QICAM launched the QIC Global Opportunities Fund, QIC Sharia Trade Finance Fund, and QIC GCC Islamic Equities Fund. Al Mannai is vice chairman and managing director of QLM Life & Medical Insurance Company, Chairman of Oman Qatar Insurance Company, and a board member at The Commercial Bank and Alternatif Bank in Türkiye.