I've been working as a manufacturing engineer at a plant in a Dow 30 corporation for 2 years. When I joined I was told I can move around the company after 2 years. I realized I'm not growing in my role and I applied for an internal role as a data scientist. My direct manager is originally supportive but as I got close to getting an offer, upper management blocked my transfer because "I've been doing a good job." The hiring manager still wants me.
With the pandemic, I really don't want to work in a plant anymore. I started job searching and now got an offer as a data scientist from a lesser known company, with equal pay.
I got about a week or so before I need to make a decision. Should I just break the news to my employer that I got an offer but I wish to stay within the company and ask them to expedite my transfer request? It's either that, or I give them a 2 weeks notice soon, so they are going to find out anyway. Honestly, I prefer to stay within my current company. But I don't want to sound like I'm threatening them.