The phrase 'complicated engineering' is correct and usable in written English.
It is typically used to refer to complicated work involving engineering or engineering designs. For example, "The bridge project required complicated engineering to ensure its structural integrity."
Solar — and, by extension, electric — flight requires neither new, groundbreaking technology, nor complicated engineering.
While solving the riddle of a little string of plastic may not seem complicated, engineering a new solution that would satisfy REI's product designers and consumers took six months.
Diverting fresh water from the Mississippi could help save the land, scientists say, but so far the cost, complicated engineering and lack of political will have thwarted long-term solutions.
However, one-dimensional analysis might not provide adequate information regarding complicated engineering situations.
The proposed algorithm can also be used to solve other more complicated engineering problems.
The application of the BEM on an inhomogeneous body consisting of many different materials offers many possibilities to solve complicated engineering problems with an irregular or regular geometry.
McCarty said that by relying so heavily on foreign partners for their engineering, Boeing devalues the so-called tribal knowledge that facilitates practical application of complicated, academic engineering concepts that eventually produce a new plane.
Safety work of coal mine is complicated system engineering.
However complicated the engineering challenges, however daunting the cost, the canal was a similar enterprise: a futuristic idea that could be made into a reality.
Nuclear donor cells that remain totipotent for longer periods of time would facilitate complicated genetic engineering in pigs.
