The phrase "a matter of engineers" is correct and usable in written English.
It can be used when discussing topics or issues that specifically pertain to engineers or engineering practices.
Example: "The design of the bridge is not just an architectural feat; it's also a matter of engineers ensuring safety and functionality."
Alternatives: "a concern for engineers" or "an issue for engineers".
The existence of subsurface karst features are always a matter of concern to engineers before any development starts because these features could cause disaster in the future.
One issue that has remained a matter of concern for engineers and designers is the shear behavior of the concrete when macro synthetic fibers are incorporated in the concrete mix.
The engineer explained, with a matter-of-fact air, that Google didn't want to sell anyone anything which they may not be legally be able to have in their locale.
The problem of the poorly damped low-frequency (0.1 0.4 Hz) oscillations of power systems has been a matter of concern to power engineers for a long time, because they limit the power transfer capability in power systems.
Improving the quality of steel and the steelmaking process has been a matter of routine for metallurgical engineers and steelmaking companies in a demanding market for quality products at highly competitive price.
It seems only a matter of time before HP engineers another hit product as it did with the HP35 calculator in 1972 or the Deskjet printer.
As a matter of fact, we helped engineer it.
The placement of the pipe was a matter of informed guesswork by mining engineers poring over maps, he said.
Executives at Sony and Canon say it is just a matter of time, however, before their engineers close the gap enough to create a multibillion-dollar winner.
Having watched the evolution of the handheld computing and communications space for some years, it seemed only a matter of time before a brilliant team of engineers somewhere would devise the ultimate combination of a wireless communicator that handles both voice phone calls, wireless e-mail and personal-organization functions.
