Which position is tasked with safeguarding cash assets and important documents?

The position tasked with safeguarding cash assets and important documents is the cashier. Cashiers are responsible for handling monetary transactions, which includes receiving and disbursing cash, maintaining accurate records of all cash inflows and outflows, and ensuring that cash registers are balanced. This role is critical in maintaining the integrity of financial operations and protecting against theft or error. By managing cash assets directly, cashiers play a key role in the financial security of the organization.

While the other options involve various responsibilities, they do not specifically focus on the safeguarding of cash and important documents. For example, the activity manager oversees the overall operation of a program or facility, while the NAF AO (Non-Appropriated Fund Accounting Officer) is involved in budgeting and financial reporting, which supports financial management but does not focus on direct cash handling. A security officer's role is centered around protecting the physical premises and ensuring safety rather than managing cash assets directly.