The purpose of the study was to examine the relationship between demographic factors and job satisfaction at Segen Construction Company (SCC), Eritrea, using Minnesota Satisfaction Questionnaire (MSQ on a five-point Likert scale). The survey was conducted in June 2017, and covered 68 employees of SCC at the headquarters in Asmara. Regression analyses on the influence of demographic factors on job satisfaction revealed that there was no significant relationship between gender and job satisfaction (r 2 =0.002; p=0.296); significant relationship between age and job satisfaction (r 2 =0.052; p=0.035); significant relationship between working experience and job satisfaction (r 2 =0.070; p=0.017); and no significant relationship between academic qualification and job satisfaction (r 2 =-0.008; p=0.506). On the extent of the influence of intrinsic and extrinsic factors on job satisfaction, the aggregate mean value of intrinsic determinants was 3.36, and that of extrinsic determinants was 3.28. Results of regression analyses yielded r 2 = 0.817; p=0.000 for intrinsic determinants, and r 2 = 0.809, p=0.000 for extrinsic determinants. Hence, the study concluded that at SCC, the intrinsic determinants had greater influence than extrinsic factors on job satisfaction.