On the 1st paragraph. Generally state about your father (name, age, career, hobby,others).
2nd para, state where is your father's working, what his doing in his job and what position. Explain.
3rd para, share about his working experiences (unforgetable moment while working)
4th para, share about your feeling towards your father's career. (Proud? Want to be like him?)
5th, conclude the points in your essay in this para.