A junior engineer is a trained engineering professional who works under the direct supervision of an engineer. The role is usually an entry-level position meant to equip the engineer with the necessary skills and experience to enable him/her to execute his/her /her duties successfully and professionally. Junior engineers are present in all engineering subsections, including civil engineering, mechanical engineering, electrical engineering, computer engineering, etc.
Under the senior engineer's supervision, a junior engineer's duties include developing project drawings, reviewing project plans and budgets, assisting in getting the required approvals, and delivering progress reports. A junior engineer spends half of the time working in the office and half of the time in the field.
A junior engineer typically works 40 hours a week, although you might be required to go beyond this due to the field's time. Also, tight project delivery deadlines might force a junior engineer to work extra hours.