You get the mission "Deadly Delivery" after completing "Security Breach"
Open the mission log to find:
Deadly Delivery
Viidu needs time to decode the separatists' data you've retrieved. While he tries to locate Skavak, you'll have to keep Rogan the Butcher off Viidu's back by taking on a dangerous mission known as the "Big Boom Run". Corso Riggs has asked to speak with you privately before you set out. Speak to him inside of Rendia Freight in Fort Garnik before leaving for the Big Boom Run.
Your first task is to talk to Corso Riggs. He tells you that the Big Boom Run isn't a stroll on the beach. You'll need an edge to make it back alive. He shows you a SoroSuub SSK heavy blaster. It's cut for a quick draw and got a hair-trigger. He calls it "Flashy". Flashy can bulls-eye a savrip between the eyes five times before the critter even knows it's dead.
Corso gives Flashy to you. Your next goa is to retrieve unstable chemicals from a contact named Trymbo in Oradan village and bring them back safely. Speak to Trymbo at his house in Oradan Village. To reach Oradan Village, exit Fort Garnik to the Northwest and follow the road. Reach the village and locate Trymbo's house. Inside you don't find Trymbo, but instead find Trybo's wife, Loonda. She tells you Trybmo is fishing on a beach nearby. Leave the house and exit Oradam Village through the west exit, then follow the path Southwest towards the beach. Find Trybmo at the foot of a cliff. Talk to him, to find out he is completely insane.
Open the storage unit near him. Once you have the Unstable Chemicals, deliver them to Viidu in Fort Garnik (Quick Travel if possible, or use the taxi station on the other side of the cliff, which you can get to by jumping to the top of the cliff then going down on the opposite side).
Viidu uses a storage unit to stabilize the canister so it doesn't blow. He is then happy to tell you that they have good news and great news. They cracked the separatist computer files and found Skavak. Skavak is taking the blasters to the separatist base inside an old volcano. Skavak's delivering the blasters to a psycho named Dareg at the base. You need to get there first. When Skavak shows up, you can ambush him, grab your ship, and fly back here.
Viidu will have a bottle of Chandrilan Brandy to open when you get back.
Viidu wants you to take Corso Riggs with you. This unlocks Corso Riggs as your companion, and concludes the mission "Deadly Delivery". The final smuggler mission on Ord Mantell, "Hitting Where it Hurts", begins now.