Teachers are encouraged to show proactive work behavior (PWB) in their involvement throughout daily organizational activities; and it is reflected in their job performance through courage to give opinions, individual innovation, proactively taking charge and problem solving. Several factors are considered to have a positive influence on PWB; therefore, this study was conducted towards the Pah Tsung School teacher population in order to examine the influence of authentic leadership on PWB with work engagement as mediating variable and job satisfaction as moderating variable. This study used a quantitative method in which the data obtained through questionnaires from 63 participants was processed with SmartPLS. The data analysis result concluded that there was no positive influence of authentic leadership on PWB. It also revealed that job satisfaction did not moderate the relationship between authentic leadership and PWB, yet it moderated the relationship between work engagement and PWB. The result showed that there was a positive influence of authentic leadership on work engagement and also work engagement on PWB. Likewise, work engagement was considered to be able to mediate the influence of authentic leadership on PWB. / Proactive work behavior dinilai penting untuk dimiliki oleh pendidik dalam keterlibatannya pada aktivitas organisasi sehari-hari, dimana hal ini antara lain tercermin dalam perilaku kerja yang melibatkan keberanian memberikan pendapat, inovasi individu, proaktif mengambil bagian, serta kemampuan menganalisa resiko dan masalah. Beberapa faktor diduga memiliki pengaruh positif terhadap proactive work behavior (PWB) dan penelitian ini dilakukan pada populasi guru Sekolah Pah Tsung dengan tujuan untuk meneliti pengaruh authentic leadership sebagai gaya kepemimpinan terhadap proactive work behavior dengan work engagement sebagai variabel mediating dan kepuasan kerja sebagai variabel moderating. Penelitian ini menggunakan metode kuantitatif dimana pengolahan data penelitian yang didapatkan melalui kuesioner terhadap 63 responden guru dilakukan dengan bantuan software SmartPLS. Hasil analisis data menyimpulkan bahwa tidak ada pengaruh positif authentic leadership terhadap PWB dan kepuasan kerja tidak memoderasi hubungan antara authentic leadership dengan PWB namun memoderasi hubungan antara work engagement dengan PWB. Hasil penelitian menunjukkan adanya pengaruh positif authentic leadership terhadap work engagement serta pengaruh positif work engagement terhadap PWB. Begitu juga dengan work engagement dinilai dapat memediasi pengaruh authentic leadership terhadap PWB.