In Sirach 43 the author is poetically praising the Creator as manager of the chaos and wild creatures of the deep. What is scary and dangerous to men is under his absolute control and function as he sees fit.
...By his wisdom he calmed the great oceans
and placed the islands there.
24 Sailors tell about the dangers of the sea,
and we listen to their tales in amazement.
25 In the sea are strange and marvelous creatures:
huge monsters and all kinds of living things.
26 Each of the Lord's messengers succeeds at its task.
Everything is held together by his word.
27 We could say much more and never finish,
but it all means this: the Lord is everything.
28 How can we find the power to praise him?
He is greater than all his creation.
29 The Lord is awesome in his greatness;
his power is overwhelming.
In Colossians 1 Paul is teaching these gentile saints that God has placed Christ at the very top of the organizational chart (well, excluding his God and Father which it goes without saying is superior to Christ). This is a theme also found in the sister letter to the Ephesians:
[Eph 1:15-23 ESV] (15) For this reason, because I have heard of your faith in the Lord Jesus and your love toward all the saints, (16) I do not cease to give thanks for you, remembering you in my prayers, (17) that the God of our Lord Jesus Christ, the Father of glory, may give you the Spirit of wisdom and of revelation in the knowledge of him, (18) having the eyes of your hearts enlightened, that you may know what is the hope to which he has called you, what are the riches of his glorious inheritance in the saints, (19) and what is the immeasurable greatness of his power toward us who believe, according to the working of his great might (20) that he worked in Christ when he raised him from the dead and seated him at his right hand in the heavenly places, (21) far above all rule and authority and power and dominion, and above every name that is named, not only in this age but also in the one to come. (22) And he put all things under his feet and gave him as head over all things to the church, (23) which is his body, the fullness of him who fills all in all.
In other words, Paul wants the Colossians and the Ephesians to understand that at the end of the day the believer is not pulled in different directions by different regimes but all ultimately answer to the higher authority.
I have a fascination with sacred architecture. Recently I was pondering this Indian temple design which, like sacred architecture all around the world there is essentially a visible representation of the principalities and powers that comprise the invisible world:
There are principalities on the lowest level, then fewer on the next level above and so on until you get to up to the tippy top where the supreme gods are.
However, Paul says that the "son of man" was placed way higher than that - "FAR ABOVE all principalities and powers" and "all things under his feet".
This thought then is somewhat parallel to Sirach's. Sirach celebrates God's control of the entirety of the sea and Paul teaches that Jesus, from God's right hand and by God putting everything beneath his feet, so too Jesus manages all of the principalities.
So in this sense there is a broad literary parallel and a similar usage of an important common word. However, coincidence does not prove causality and beyond their similarity of theme there is no way to establish any borrowing.
"Hold together", which is what most English translations have for συνίστημι, is, I believe, misleading. Given the context and the aktionsart (even though it is a stative verb) I'm inclined to see it as "...and by him all things have been [re-]organized" (referring in the context to the thrones, dominions, principalities and authorities of the new regime).
BDAG suggests this usage:
...③ to come to be in a condition of coherence, continue, endure, exist, hold together, pres. mid. and perf. act. (EpArist 154 τὸ ζῆν διὰ τῆς τροφῆς συνεστάναι; Tat. 30, 1; Mel., P. 91, 681) γῆ ἐξ ὕδατος καὶ διʼ ὕδατος συνεστῶσα 2 Pt 3:5 (mngs. 2 and 3 are prob. blended here and in the next pass.; s. also Philo, Plant. 6). τὰ πάντα ἐν αὐτῷ συνέστηκεν Col 1:17 (cp. Pla., Rep. 7, 530a, Tim. 61a; Ps.-Aristot. DeMundo 6, 2 ἐκ θεοῦ τὰ πάντα καὶ διὰ θεὸν συνέστηκεν; Philo, Rer. Div. Her. 58; PGM 4, 1769 τὰ πάντα συνέστηκεν; Ar. 1, 5 διʼ αὐτοῦ δὲ τὰ πάντα συνέστηκεν). SHanson, The Unity of the Church in the NT ’46,
112.—RWard, Aristotelian Terms in the NT: Baptist Quarterly 11, ’45, 398–403 (συνίστημι).—M-M. EDNT. TW.
Arndt, W., Danker, F. W., & Bauer, W. (2000). A Greek-English lexicon of the New Testament and other early Christian literature (3rd ed., p. 973). Chicago: University of Chicago Press.
But I don't think usage #3 is really in view. I think it is usage #1:
A. transitive, act., pass., and mid.
① to bring together by gathering, unite, collect pass. of the water of the boundless sea συσταθὲν εἰς τὰς συναγωγάς collected in its gathering-places 1 Cl 20:6.
Arndt, W., Danker, F. W., Bauer, W., & Gingrich, F. W. (2000). A Greek-English lexicon of the New Testament and other early Christian literature (3rd ed., p. 972). Chicago: University of Chicago Press.
Here is the passage that BDAG mentions in context from 1 Clement (which probably is an allusion to Sirach, or the other way around):
1 Clem. 20:5 Moreover, the inscrutable depths of the abysses and the unutterable statutes of the nether regions are constrained by the same ordinances.
1 Clem. 20:6 The basin of the boundless sea, gathered together by His workmanship into it's reservoirs, passeth not the barriers wherewith it is surrounded; but even as He ordered it, so it doeth.
1 Clem. 20:7 For He said, So far shalt thou come, and thy waves shall be broken within thee.
1 Clem. 20:8 The ocean which is impassable for men, and the worlds beyond it, are directed by the same ordinances of the Master.
1 Clem. 20:9 The seasons of spring and summer and autumn and winter give way in succession one to another in peace.
1 Clem. 20:10 The winds in their several quarters at their proper season fulfill their ministry without disturbance; and the ever flowing fountains, created for enjoyment and health, without fail give their breasts which sustain the life for men. Yea, the smallest of living things come together in concord and peace.
1 Clem. 20:11 All these things the great Creator and Master of the universe ordered to be in peace and concord, doing good unto all things, but far beyond the rest unto us who have taken refuge in His compassionate mercies through our Lord Jesus Christ,
1 Clem. 20:12 to whom be the glory and the majesty for ever and ever. Amen.
Rather than "held together" I would say "brought together under control".