Knowing what "providence" is, is helpful: "pro" (ahead) + "videre" (to see).
Ezekiel is an example of "fore-seeing" per the Light of God he received/harmonized with.
An "Angel message" is an Idea (of Light, typically not seen in the physical) of God; this is the more normative way most people are "protected by providence"--their protection is per their attunement with the Angels' messages.
This is quite scientific, in the higher sense of the Word. God, as Divine Energy, Light, is Omnipresent yet not Immanent for those who, unlike Ezekiel, are not interested in at-One-ness. Immanuel Kant noted this tendency of materialism or engrossment with Matter, among scientists of his day, and when his contemporary scientist-seer Emanuel Swedenborg far-saw a unique contemporary event and reported it accurately before many witnesses, Immanuel was unable to explain it within his phenomenalism. Swedenborg wrote [applicable re phenomenalism and Noumenon or God as Immanent Spirit], "I have often talked with angels on this subject, and they have invariably declared that in heaven they are unable to divide the Divine into three, because they know and perceive that the Divine is One and this One is in the Lord."
For those whose "hearts are softened toward or receptive to Divine Love," "God with us" is a more experiential reality. The admonishment "try the spirits" is sound and scientific. One may develop a closer providience-relationship by meditation, awareness of Self in dreams (lucid dreaming is part of this), and so on.
If your father and coworkers were in any respect motivated by some prompting of Angels, then, yes, your father and coworkers were definitely saved by providence.
Related: "Understanding Yourself" by Mark Prophet; "Light Is a Living Spirit;" "The Great Divorce;" "Return to the One: Plotinus's Guide to God-Realization;" "One Magisterium: How Nature Knows through Us;" "God at the Speed of Light."