Access database maintenance

General information for the business: We are a translation firm using an Access database for customer relatationship management and project management. We are looking for an Access specialist
Kind of development: Customization of existing program
Description of every module: We have an effective Access DB written to our requirements but the developer has retired so can't help us any more
Description of requirements/functionality: The are some minor errors which need correcting and certain improvements that we wish to make
OS requirements: Windows
Extra notes: We are prepared to consider an annual maintenance agreement