...I think being so exposed to these industries may be more risk than I am willing to take.
Is there a way to shift this money and minimize the tax burden that I am overlooking?
Expat FI Guy, welcome to the forum.
If the first phrase quoted above is true, then a "reasonably aggressive" move plan makes sense. This would not be unlike someone who has accumulated a large amount of one successful company's stock through employee stock purchase plans, options, etc., and then decides the risk is too high. Selling all at once may or may not be the plan, but letting distaste of playing taxes prevent one from selling any is not wise.
You could start by selling lots with losses, then move to lots with not too much gain, then lots with medium gains, etc. You could also either eyeball your holdings and estimate the amount you want to sell in a given year, or use a spreadsheet with your lot basis information that feeds a capital gain number into a tax spreadsheet such as the
case study spreadsheet, or some other method.
Good luck!