

Ah, perhaps...If your skill set is in demand...at the time you apply! If not, it's a prolonged search.

It depends on your engineering discipline and what industry you are in. Have you pursued your Professional Engineering license? Options to make more money is to pursue working in a nuclear power plant or remediation site. Another option is to open your own consulting firm. If you’re asking the question and have less than 5 years of experience then I would tell you to wait a little longer. Once you start getting towards 10 years of experience, you will notice a significant increase in salary. Hang in there!

There may be groups where grammar and presentation are important. I’ve found in my 35 years experience the most valuable engineers are those who stay with a company 10 years or more and learn everything they can about the product. Then, it doesn’t matter what you sound like or how you dress or present yourself. What matters is that you know your product inside and out and know what your talking about. When you become a subject matter expert in your field, you will gain respect and the money will come.

I have seen that to earn more money as an engineer you must position yourself to become a senior or staff engineer. In order to do that you might earn a graduate degree or get specialized training that would apply to work being done at your business. That may include things such as: certified project manager, six sigma certification, or automation expert.

Very great point Dana! How we present ourselves as a professional goes a very long way towards success. 1. Learn better English writing skills. 2. Learn to look for needs that need to be filled using Design/Build presentation skills and sell your services like I do. 3. Understand the Engineering and CM/GC markets and how can you increase their Value proposition

Learn & use proper grammar for a start.

Get your PE, Consult, charge for plan reviews and approvals

U can advertise on task rabbit.com for private work

I can't help you, I've been away from that field since1995
"Engineer" covers a rather broad spectrum of possibilities. Are you talk about civil, software, systems, mechanical, electronic? Rocket Scientist and Aerospace Engineer are real jobs with an increasing bucket of opportunity. Seems we have more software engineers than other types. As one of those myself (with background in electronics engineering and systems engineering), I can say from experience that to start by looking at the job listings within the framework of your specific engineering discipline is a very good way to see what is really going on.
Look at the skill requirements listed. Look at the proposed salary ranges. And research the individual companies with listed openings, including checking out employee reviews with resources like Glass Door. Other factors to "making more money" include employee turnover rates, industry trends toward outsourcing / off-shoring jobs in your industry slice, and available work-at-home options, which can broaden the range of possibilities for you considerably.
Good luck. Meanwhile, keep in mind that it's not all about the money. You can spend twenty years in a field and discover you cannot stand it any longer. Burnout is a Thing. Make sure you choose to do something you love or at least strongly like.
If you're only about the money, you may want to consider becoming a YouTube star, a professional climate denier, or a televangelist. There the sky's the limit. You can be your own boss and not be bothered with silly things like Reality. ;-)