This article presents the results of an internship conducted at the Investment and One-Stop Integrated Services Office (DPMPTSP) of Serang City, specifically within the General Affairs and Personnel Sub-division (Subbagian Umum dan Kepegawaian/Umpeg). The study focuses on the optimization of personnel governance and general administration as a strategic means of improving public service quality in the context of bureaucratic reform. A qualitative descriptive method was applied through participatory observation, direct involvement in administrative tasks, informal interviews, literature review, and document analysis. During the internship, the student was engaged in managing outgoing letters, assigning letter numbers, scanning and archiving documents in filing cabinets, recording attendance data for ASN (Civil Servants) and PPPK (Government Employees with Work Agreements), and supporting general administrative operations. The findings demonstrate that personnel governance and general administration at DPMPTSP Serang City are carried out in an organized and procedurally compliant manner, contributing to the effectiveness of internal coordination and public service delivery. However, constraints were identified, including limitations in digital archiving systems and potential data inconsistencies. Analysis through the lenses of bureaucratic theory, public management, and good governance principles particularly accountability and transparency confirms that structured administrative management is a fundamental pillar of effective and accountable government. Recommendations include accelerating digital integration of archiving and administrative systems and developing staff competency to support sustainable administrative modernization.