As far as I know, a הַפֹּרֵיץ wasn’t a profession/military title. However, it is probable that someone who barge in something was called הַפֹּרֵיץ. One thing does not rule out the other. Yet, in the TaNaKh (Hebrew Bible), פרץ was also a proper name. We found a typical example of this usage in Gen 38:29 when Tamar said to his newborn baby מה־פרצת עליך פרץ “How have you breach for yourself a breach?”, and then she called him ‘Perez’ (פרץ).
So, although this term doesn’t indicate (in the Hebrew Bible) a specific profession, a person may perform the action the conceptual root points.
For example, starting from the time of the baptism/anointing of Jesus the Messiah, he made ‘a breakthrough’ helping men to free themselves from the chains of spiritual error and slavery under the sin. The apostle Paul spoke of the need of humankind to be set free from the “bondage of corruption.” (Rom 8:21, Webster). Jesus Christ told Jews who had believed in him:
“If you abide in My word, then you are truly My disciples. You will know the truth, and the truth will set you free!” (Joh 8:31-32, Tree of Life Version).
To those who thought they had freedom just because they were Abraham’s fleshly descendants, he pointed out that they were slaves of sin, and he said:
“So if the Son sets you free, you will be free indeed!” (Joh 8:36, ibid; compare Rom 6:18, 22).
Keil & Delitzsch’ s Commentary on the OT (on Mic 2:13) presents a similar idea, citing also two correlated passages of the prophet Isaiah:
“הַפֹּרֵיץ, the breaker through, who goes before them, is not Jehovah, but, as the counterpart of Moses the leader of Israel out of Egypt, the captain appointed by God for His people, answering to the head which they are said to choose for themselves in Hos 2:2, a second Moses, viz., Zerubbabel, and in the highest sense Christ, who opens the prison-doors, and redeems the captives of Zion (vid., Isa 42:7). Led by him, they break through the walls, and march through the gate, and go out through it out of the prison. “The three verbs, they break through, they march through, they go out, describe in a pictorial manner progress which cannot be stopped by any human power” (Hengstenberg). Their King Jehovah goes before them at their head (the last two clauses of the verse are synonymous). Just as Jehovah went before Israel as the angel of the Lord in the pillar of cloud and fire at the exodus from Egypt (Exo 13:21), so at the future redemption of the people of God will Jehovah go before them as King, and lead the procession (see Isa 52:12).”
Alexander McLaren (Expositions of Holy Scriptures) also present the same idea:
“So I make no apology for taking the words before us as having their only real accomplishment in the office and working of Jesus Christ. He is ‘the Breaker which is come up before us.’ He it is that has broken out the path on which we may travel, and in whom, in a manner which the Prophet dreamed not of, ‘the Lord is at the head’ of us, and our King goes before us. So that my object is simply to take that great name, the Breaker, and to see the manifold ways in which in Scripture it is applied to the various work of Jesus Christ in our redemption. […] I follow entirely the lead of corresponding passages in other portions of Scripture, and to begin with, I ask you to think of that great work of our Divine Redeemer by which He has broken for the captives the prison-house of their bondage.”
The same conclusion was reached from the following commentators: F. B. Meyer (Through the Bible day by day), John Gill (Exposition of the Bible), Matthew Henry (Commentary on the Whole Bible), Jamieson-Fausset-Brown’s Commentary, Albert Barnes’ Notes on the Bible, The Cambridge Bible for Schools and Colleges, Adam Clarke’s Commentary on the Bible.