The Inside Job is a Minutemen quest you obtain from Sturges in Sanctuary. He gives you it just as you are about to infiltrate The Institute during The Molecular Level.
Once you go through the teleporter, simply interact with the terminal and insert the Network Scanner holotape. Once it's done, remove it and bring it back to Sturges to finish the quest.
This quest is the first step towards aligning yourself with the Minutemen, if you decide to take their path.
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