Sons of God in
Job 1:6 and
Job 2:1 can not be angels in these verses especially when Satan who is an angel just as the other fallen angels that were cast out of Gods heaven and are in everlasting chains (not literal chains) under darkness unto the judgment of the great day,
Jude 1:6,
Satan came and went from the earth, and was not in chains.
Again there was a day when the sons of God came to present themselves before the Lord, and Satan came also among them to present himself before the Lord. 2 And the Lord said to Satan, “From where do you come?”
Satan answered the Lord and said, “From going to and fro on the earth, and from walking back and forth on it.” Job 2:1 NKJV
The angels being referred to in Jude 6 are referring to the angels in Genesis 6 who did not keep their own abode, which is the spiritual realm, and had intercourse with the women during the time of Noah, which is why Jude indicated "sexual immorality", in the context, referring to Sodom.
6 And the angels who did not keep their proper domain, but left their own abode, He has reserved in everlasting chains under darkness for the judgment of the great day; 7 as Sodom and Gomorrah, and the cities around them in a similar manner to these, having given themselves over to sexual immorality and gone after strange flesh, are set forth as an example, suffering the vengeance of eternal fire. Jude 6-7 NKJV
Jude was well read with Enoch and quoted him, in verse 14 which reads -
14 Now Enoch, the seventh from Adam, prophesied about these men also, saying, “Behold, the Lord comes with ten thousands of His saints, 15 to execute judgment on all, to convict all who are ungodly among them of all their ungodly deeds which they have committed in an ungodly way, and of all the harsh things which ungodly sinners have spoken against Him.” Jude 14-15 NKJV
One only needs to read the book of Enoch, which is referenced here in Jude, to know the angels Jude was referring to.
One might claim Enoch as not being a viable source to quote since its not a part of the Bible, but then one must consider that Enoch writings is referenced in scripture here by Jude.
ME