Almaiman joined KHC in 1996 – a company founded in 1980 by billionaire Prince Alwaleed Bin Talal Alsaud – and assumed his current position in 2017. In H1 2025, KHC's total assets amounted to $16.1 billion and generated $214.6 million in net profit. In October 2024, Jeddah Economic Company, a KHC associate, signed an agreement with Saudi Binladin Group Company to resume construction of the Jeddah Economic Company Tower project, valued at $1.9 billion. Almaiman serves on the boards and executive committees of major companies, including Dallah Health. He is also Vice Chairman of BSF, Tasnee and flynas.