what are some unique careers that are always in need of workers?

I agree with Melissa that in-demand careers change over time; however, I think certain skills are valuable in a variety of careers.

These are:

- being able to work well with numbers, e.g., math skills. Being comfortable working with numbers is important to so many careers from being an investment banker to a scientist to a computer engineer

- being an effective communicator, this includes speaking as well as writing

- being able to tackle complex problems--knowing how to break a complicated problem down, where to get resources and find answers

- being able to work well with other people--this is related to the communications point, but goes beyond that because it also involved being able to understand where other people are coming from, being able to influence. This skills is super important no matter where you work and what type of work you do. There are very very few careers whether you don't need to be able to work well with other people

It's a bit hard to predict what careers are ALWAYS in demand because the world changes and employment opportunities change. But according to the bureau of labor statistics (for more details click here), the jobs where employment is projected to grow the fastest over the next 10 years include:

Personal Care Aides

Home Health Aides

Biomedical Engineers

Brickmasons, Blockmasons, Stonemasons, and Tile and Marble Setters

Carpenters

Veterinary Technologists and Technicians

Reinforcing Iron and Rebar Workers

Physical Therapist Assistants

Pipelayers, Plumbers, Pipefitters, and Steamfitters

Meeting, Convention, and Event Planners

Diagnostic Medical Sonographers

Occupational Therapy Assistants

Physical Therapist Aides

Glaziers (people who install glass)

Interpreters and Translators

However, a really important thing to keep in mind is that how much these jobs earn is really different, and how much schooling is required for these jobs is really different. For example, the personal care aides only make around $20,000 a year, but you don't need to go to college to become a personal care aide. On the other hand, a biomedical engineer makes around $80,000 a year, but you need a 4-yr bachelor's degree.

info from forbes
Engineering

Most In-Demand: Manufacturing Engineer (pays $79,814 annually for 3 to 10 years of experience)

2nd: Mechanical Engineer (pays $84,714 annually for 3 to 10 years of experience)

3rd: Electrical Engineer (pays $90,295 annually for 3 to 10 years of experience)

“Engineers will be highly sought after this year, especially within organizations that have not typically required engineers in the past,” said Richard Zambacca president of Randstad engineering. “The healthcare and entertainment industries are just two examples of sectors that will look to hire more engineers in 2016 to support new and innovative technologies.”

Finance & Accounting

Most In-Demand: Senior Accountant (pays $61,000 to $85,000 annually)

2nd: Cost Accountant (pays $51,000 to $74,000 annually; management positions can expect $85,000 to $135,000)

3rd: Finance Manager (pays $82,000 to $130,000 per year.

Human Resources

Most In-Demand: Human Resources Generalist (pays $45,000 to $67,000 annually)

2nd: Learning & Development Manager (pays $65,000 to $90,000 annually)

3rd: Human Resources Business Partner (pays $85,000 to $120,000 annually)

"While HR professionals with a broad base of knowledge are still in very high demand, we do anticipate that organizations will gravitate this year toward candidates with more specific skill sets to cope with an increasingly complex workforce environment,” says Kathryn Bolt, group president of Randstad Professionals and Tatum. “HR specialists must bring deeper expertise to the executive team around critical matters such as talent acquisition and retention, succession and compensation planning as well as workforce engagement—all while contributing to more informed business decisions."

Information Technology

Most In-Demand: Project Manager (pays $73,000 to $121,000 annually, with an average of $98,000)

2nd: Software Engineers (pays $72,000 to $109,000, with an average of $90,000)

3rd: Network and Security Engineer (pays $52,000 to $137,000 annually, with an average of $93,000)