Administrative Assistant

Job description

About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role: We are seeking a highly organized and proactive Administrative Assistant to support day-to-day administrative operations across multiple locations. This role is ideal for someone early in their career who is detail-oriented, resourceful, and eager to grow within an operations or executive support function. The Administrative Assistant will provide calendar and travel coordination, expense management, on-site office support, and serve as backup to the Executive Assistant when needed. This position requires strong communication skills, flexibility, and the ability to manage competing priorities in a fast-paced environment. What You’ll Do: Administrative & Calendar Support: Assist with scheduling meetings, managing calendars, and coordinating internal and external appointments Help prepare meeting materials, agendas, and notes as ne...