There is only 1 mediator between God and men. If you aren't in Christ, you are in trouble.
Adonai Eloheinu appears throughout the age of Israel, who later became Jesus Christ (in the Incarnation) who always was the go-between for man and God.
Job mentions the Lord God as his mediator.
I know that my redeemer lives,
and that in the end he will stand on the earth.
And after my skin has been destroyed,
yet in my flesh I will see God;
I myself will see him
with my own eyes—I, and not another.
How my heart yearns within me!
Job 19:25-27