Citation analysis, at its most basic, is simply counting the number of times an article has been cited in other publications. The USA Libraries have a number of resources that can help you do this, and there several that are publicly available as well.
Scopus
Citation counts for authors listed in Scopus go back several years. To find them:
As in Scopus, search for an author by name along with a combination of other factors such as affiliation. If you have an ORCID ID, that works best. Many researchers who have published in journals covered by Web of Science will also have a Researcher ID affiliated with WoS. Use that if you have it.
An author's profile looks like this:
You can also view a complete citation report and export the report.