Which sentence is appropriate should the word be launch or launching?

Since the launching of phishing campaign, a number of staff along with yourself have been identified as clicking on multiple phishing links.

Since the launch of phishing campaign, a number of staff along with yourself have been identified as clicking on multiple phishing links.

Both are correct, but I prefer the second sentence.

Since the launch of phishing campaign, a number of staff along with yourself have been identified as clicking on multiple phishing links.

The sentence that is appropriate is:

"Since the launch of the phishing campaign, a number of staff along with yourself have been identified as clicking on multiple phishing links."

To determine which word to use, you need to consider the tense of the verb. In this case, the action of launching the phishing campaign has already occurred in the past. Therefore, the correct form is "launch" in the past tense, rather than "launching" in the present participle form.