I should have said state 'university'rather than state.
LANL lab employees are not all unionized, but a lot of pressure is being put on them by UC union organizers.
Even with state university lab employees, it is only the most liberal blue states where you find any really significant unionization. Maybe you live in such a place. I've been employed in university research for almost 40 years and have met very few unionized lab workers except in CA, MA, NY and MN. Most of the university lab workers in red states generally still are not (depends on the university), although they are getting pressured by unions to join.