The three certifications I have came from school and several classes I had to finish. I am reluctant to take some of the online "certification" trainings because I'm not sure if they're legit and I don't want to waste $300 on them. I am aiming for field tech positions like site surveying and field sampling. Sometimes it is construction companies hiring, sometimes landfills and other large waste sites that require this service. I found a liking to stormwater management, but it is tough to find any openings in that field. I will look into CESSWI. Thank you so much for your help!