Every company has a handful of staff in a given area of expertise that you can count on to get the job done.
how to analyze above sentence?
Every company – Subject of main clause
has-- Verb of main clause
a handful of staff in a given area of expertise that you can count on to get the job done-- DO of main clause.
you-- Subject of relative clause
can count on – Verb of relative clause
to get the job done – Infinitive clause as verb complement of relative clause