In recent years, Augmented Reality (AR) started transitioning from an experimental technology to a more mature area, with new types of applications in entertainment, marketing, education, retail, transportation, manufacturing, construction, and other industries. One of the main challenges for AR-based field service tools is to help users to correctly locate company's assets and infrastructure in the field. This paper presents an AR system using private maps to find company's assets to support field workforce tasks. The AR system is based on fuzzy logic mechanisms to provide the user with directions for asset location by comparing his/her current position with assets' location in real-time. Auditory and visual feedback is provided via a head mounted display (HMD), enhancing user's perception to achieve human augmentation.