Each profession illustrated in dreams carries specific meaning, commonly the attribute that first comes to mind when you think of that profession.
For example, an astronaut is adventurous and highly trained, bartenders are thought to be good listeners, and secretaries exhibit strong organizational skills. So, dreaming of all three of these individuals together might indicate the need to hone your personal listening skills for greater effectiveness.
Note that if you cannot find the specific profession dreamt of in the main listings, review that professions central goal, location, and / or tools for possible meaning.
For example, look up nurse under healing or women, and construction workers under hammer, nails, or tools. [1]