THE INFLUENCE OF WORK ENVIRONMENT AND INTERPERSONAL RELATIONSHIP TO THE EMPLOYEES’ JOB SATISFACTION AT PT WIJAYA KARYA BETON TBK SALES REGION IV SEMARANG Employees’ job satisfaction is influenced by several factors: a challenging job, award, work environment and interpersonal relationship. PT Wijaya Karya Beton Tbk is a company which manufactures precast concrete. Like other companies, Wik…