As is being pointed out in other answers and comments, your engineering experience will certainly add value in terms of your contributions in a data science position. However, since your specific question was,
I was wondering if I can use it in my salary negotiation as the years of experience in the industry?
I think the answer is, it depends.
If you're talking about bringing up your experience in the context of a salary negotiation, you need to be sure it's being described accurately. In other words, if you were an engineer for 10 years, you can claim you were an engineer for 10 years - and then explain how you think that will benefit your data science work. But, if the employer asks for how many years you've been doing data science work, or how many years of experience you have in the data science industry, it would be misleading and inaccurate to just say "10 years" without explanation.