Weekly task - Have 4 sims employed as firefighters.
4 adult sims are needed for this. If you do not have 4 unemployed sims like I do you can select one that has another career and change it to firefighter.
Open the career&education tab and click on the brief case icon to open the Choose an occupation prompt. Select Firefighter and click Accept this job. Repeat this for 4 adult sims to clear the task.