Would recommendation letters from the chemists in the industry lab I work in be helpful? A little background info,

I'm currently working as a lab technician in a drug lab which focuses on clinical chemistry and toxicology. I wish to eventually, within a few years tops, go back for my upper level degrees. I didn't have any close relationships with professors of mine as an undergrad, and as a result, I'm currently lacking possible grad school recommendations.

Would anyone recommend using recommendations from chemists, with PhD's, who work in the industry as beneficial grad school recommendations? They both serve as my employers/ bosses, and I'm 99.99% they would give high recommendations if asked. However, would these even help me on my applications?

Also, if anyone has any possible actions I could take that would help me strengthen a grad school application, that are possible with the time window mentioned above, 2-3 years, that would be very much appreciated.
Assuming you're applying for Ph.D. programs, the basic question admission committees usually need to answer is "Is X capable of becoming a good researcher?" If your supervisors, both of whom have Ph.D.'s, can answer that question successfully, then there's no reason not to use them—particularly if they know your work more closely than someone who only taught you in courses.