Job essentially desires a lawyer to speak up for him before God. He wants to know why all these events happened to him. He doesn't know of anything he has done to deserve such great losses in his life. He essentially is afraid of God. In some sense Job is wondering if God is not "out to get him." Thus, he wants an arbitrator to speak on his behalf with the hope that God would stop pouring out his wrath upon him. Job wants a lawyer.
Ironically, in the same hour that I was reading Job 9 and pondering his story, I also contemplated the words of the apostle John in his first letter, "My dear children, I write this to you so that you will not sin. But if anybody does sin, we have one who speaks to the Father in our defense - Jesus Christ, the Righteous One" (1 John 2:1 NIV). Job wanted a lawyer to represent him before God. John knew a lawyer who represents us to God- Jesus Christ. Job didn't recognize any sin in his life that deserved such wrath, thus he wanted a lawyer. John knew he had a lawyer for when he sinned or rebelled against God and deserved wrath.
This lawyer, according to John, was Jesus Christ. Jesus is "the atoning sacrifice", or in other words, "he is the one who turns aside the wrath of God, taking away our sins" (1 John 1:2). (The big word is propitiation, and the quote material in the last sentence is two ways people try to translate that big word in easy terms.) This lawyer, Jesus, not only represents us before God, he took the wrath of God upon himself. This lawyer experienced the wrath of the judge on behalf of us. What other lawyer would do that?
What if the life of Job would have occurred after Jesus' death and resurrection? Job would have known that he had a lawyer on his side before God - Jesus. No, the circumstances may not have changed, but he would have know someone had fought and is fighting on his behalf.
Do you need a lawyer before God? We have one - Jesus Christ.