The workers miss being credited for their efforts.

Nur ein "Schnellschuss" - sicher gibt es noch "elegantere" Möglichkeiten ...

(native speakers ...??)

The workers feel that their achievements go unnoticed.
The workers feel that their accomplishments go unappreciated.
The workers would like their accomplishments to be recognized.
The workers would like their accomplishments to be acknowledged.
The workers would like to be complimented on their achievements.

A translation with "vermissen" would be something like

The workers miss the recognition of their accomplishments.

But it'd be better if you gave more context, as this would mean that at one time they were appreciated, and are no longer, and the workers miss it in the sense of "sehnen nach". This sounds really strange in english.

The workers miss being praised for their accomplishments.

ingeborg: Ich verstehe, was "förmlich" ist, aber was meinst Du mit "süffig"?