Penelitian ini bertujuan untuk menganalisis variable gaya kepemimpinan, motivasi kerja, disiplin kerja dan lingkungan kerja terhadap kinerja karyawan PT. Mangli Djaya Raya Jember. Populasi pada penelitian ini adalah karyawan/buruh pada PT. Mangli Djaya Raya Jember yang berjumlah 740 karyawan/buruh dengan jumlah sampel yang digunakan sebagai responden adalah 89 karyawan/buruh. Pengumpulan data dilakukan dengan memberikan kuesioner kepada responden. Skala yang digunakan adalah skala likert. Teknik pengumpulan data menggunakan observasi, wawancara, dan kuisioner dan teknik pengambilan sampel menggunakan stratified proportional random sampling.Teknik analisis data menggunakan uji validitas, uji reliabilitas, uji normalitas, uji multikolinieritas, uji heteroskedastisitas, analisis regresi linier berganda, koefisien determinasi, uji t dan uji F. hasil penelitian menunjukkan bahwa gaya kepemimpinan berpengaruh positif dan signifikan terhadap kinerja karyawan, motivasi kerja berpengaruh positif dan signifikan terhadap kinerja karyawan, disiplin kerja berpengaruh positif dan signifikan terhadap kinerja karyawan PT. Mangli Djaya Raya Jember, dan lingkungan kerja berpengaruh positif dan signifikan terhadap kinerja karyawan. Hasil uji f menunjukkan gaya kepemimpinan, motivasi kerja, disiplin kerja, dan lingkungan kerja berpengaruh secara bersama-sama terhadap kinerja karyawan.

The purpose of this research is to analyze the variable of leadership style, work motivation, work discipline and work environment employee performance. The population of this research is PT. Mangli Djaya Raya JembersÂ’ employee, the number of employee are 740 with the number of sample that are used as respondent are 89 employees. The collecting of data is using with way give the questionnaire paper to the respondent. In this research is use Likert scale. The technique of collecting data is use observation, interview, and questioner paper, and the technique of colleting sample is use stratified proportional random sampling. In order to analyze the data are use validity of the test, reliability of the test, normality of the test, multi colinierity of the test, heteroskedastisity of the test ,the analysis of multi linear regression coefficient of the determination, t test and F test. The result of this research showed that the leadership style had positive influenced and significant to employee performance. work motivation had positive influenced and significant to employee performance. Work discipline had positive influenced and significant to employee performance. And also work environment had positive influenced and significant to employee performance. The result of F test showed that the leadership style, work motivation, work discipline and work environment could influenced employee performance.

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