"pinnacle of engineering" is correct and usable in written English.
You could use it to emphasize something as an impressive example of engineering, such as: "This new skyscraper is the pinnacle of engineering, pushing the boundaries of modern construction."
I'm telling you, this thing is the pinnacle of industrial engineering.
But doing the same thing in a sports car only proves that Honda is at the pinnacle of automotive engineering.
So although I feel they've pretty much reached the pinnacle of mouse engineering with the Mamba, I happily concede that the form factor may not be for everyone.
Historian Arnold Taylor described Beaumaris as Britain's "most perfect example of symmetrical concentric planning", and for many years the castle was regarded as the pinnacle of military engineering during Edward I's reign.
Not everyone appreciated this feat that placed Gustave Eiffel at the pinnacle of 19th-century engineering, alongside Isambard Kingdom Brunel of Britain and others.
Burritos are the pinnacle of food technology.
Each generation of Air Max has represented the pinnacle of Nike's Air technology, engineering in as much air cushioning as scientifically possible at a reasonable price point and a robust build level.
"Its stature is immense, not only as the iconic Fangio car of the 1950s, but also as a shining star of pinnacle Mercedes-Benz engineering and as an icon of post-war recovery".
NASA's Saturn V was great and all, but this Facebook thing -- here was a truly miraculous engineering breakthrough, a pinnacle of human ingenuity that offered, at last, a means of telling the world about all the very cool, very flowmentum-y things we were doing, without needing anyone to ask, much less care.
The vessels are feats of engineering more complex than the space shuttle, produced by men and women at the very pinnacle of British manufacturing.
