Va. Code Ann. § 15.2-641

The county manager shall give bond in the amount of not less than $5,000. The director of finance shall give bond in accordance with general law. If the county manager also serves as director of finance, he shall give bond in the full amounts indicated above. The board shall have the power to fix bonds in excess of these amounts and to require bonds of other county officers in their discretion, conditioned on the faithful discharge of their duties and the proper account for all funds coming into their possession.