The factors that deteriorate the ability for work begin to compound in the middle age, with the work group of 45 years of age being the most vulnerable. Aim: The purpose of the present study is to examine, to what extent the WAI is related to the age and the educational level of employees. Material- Method: The sample of this study has been 98 employees of an industrial corporation in the prefecture of Athens, in terms of forming a random sample from all the age groups and with different number of years in work. The original questionnaire of WAI was used to evaluate the Workability, which has been developed by the FIOH. For the statistical analysis it was used the statistical program SPSS 13 and the statistical tests x2 and t-test. Results: As far as the sample's demographics are concerned, the mean age of the employees was 45 years. Concerning the marital status, 76% were married, 20% single and 4% divorced or widowed. Concerning the educational background, 16% had attended primary education, 11% had basic education, 20% had Lyceum education, 34% high education and the 19% university education. 49% of the interviewees scored in the WAI: Excellent category, 43% scored in the WAI good, 7% scored in WAI moderate and only 1% of the employees scored in the WAI poor. Correlating the WAI with the age showed that, as age increases, there is a justified expected decrease in WAI (p<0.040). Correlating the sample of 98 employees in relation to their educational background and their WAI category, was found a statistically significant degree of difference (p<0.019). Conclusions: WAI is related so much in the employees' age dispersion, as in their educational background.