For workers of all ages, work satisfies a range of needs, including financial security, a sense of accomplishment, recognition for superior performance, skill development, and social status. However, both youths (aged 16 to 24 years old) and older workers (aged 55 years or older) often find themselves at a disadvantage in the job market. These two age groups account for nearly 50% of the unemployed labor force in the United States, and they continue to face employment hurdles associated with skills and experience deficits due to lack of training or development opportunities. This research brief focuses on the employability of youths and older workers and the important role that training and development can play in strengthening the skills of job seekers and the productivity of the workforce.