DETROIT — Two years ago, General Motors hired engineer Annette Diver, even though she’d taken a 15-year hiatus to raise her sons.

As she prepared to re-enter the workforce, she realized a lot had changed.

“Everybody sounded like they had their own language. They were all talking in acronyms,” Diver said. “It was as if I had to learn 100 more processes to do my job.”

Likewise, the advanced technology was intriguing, but intimidating.

“We didn’t have 3D printers,” said Diver, 49. “Now 3D printers can make engines that run oil through them. We didn’t even have the World Wide Web when I was an engineer in the ‘90s. We had computers, but nothing like now … a whole vehicle can be put together right there on the screen.”

To help Diver — and others like her who have taken two or more years off from work — return and learn the job advancements, GM has created a 12-week paid program called Take 2. It supports GM’s growing need for engineers and helps in GM’s efforts to diversify its culture. Through Take 2, GM has hired dozens more women and minorities, while closing the skills gap that some older workers face when they re-enter the workforce.

“Many of these individuals lack confidence and think, ‘Who’ll want me? I don’t know how to use, say, LinkedIn,’ ” said Scott Klott, GM’s senior talent acquisition manager. “It’s not that they lack the skills, it’s that they wonder if they will add value to an organization?”

That insecurity was palpable Sept. 26 in GM’s headquarters in Detroit.

A group of 33 anxious Take 2 inductees huddled in a small conference room listening to Jessica Galich, GM’s gender diversity recruiting leader, outline the 12-week agenda. The 31 women and two men are the sixth installment of GM’s Take 2 program.

Galich was forthright. She told the group parts of the program will be “nerve-racking” for some. But if all goes well, they will receive a job offer in week 11 and start in January, she said. Faces light up at the prospect of a career again.

“I honestly never thought such an opportunity would ever come back to me,” Shikha Mohan told the group during their introductions that morning.

Mohan took seven years off of work as a risk management consultant to follow her husband to Australia for his job, she said. In the process, she had two children.

“I’m so excited and so grateful to GM for this opportunity,” Mohan said. “I’m going to make the most of it.”

One man told the group he was “thankful” to have been selected for Take 2, but he felt “overwhelmed” by all he will have to learn.

But GM benefits, too, from Take 2. According to the U.S. Department of Labor, Bureau of Labor Statistics, job growth in the engineering industry will result in about 500,000 unfilled positions from 2014 to 2024, GM said.

Yet, there are more than 2.5 million women in the U.S. with science, technology, engineering and mathematics degrees, 32 percent of whom have engineering and computer science degrees. Nearly a quarter of them have left their technical careers to care for their families, Klott said.

In 2016, GM started aggressively hiring and has hired 17,000 salaried and hourly people. It has 180,000 employees globally.

GM launched Take 2 in 2016 and has had more than 8,000 applicants since then, accepting only 84. Of those, GM offered salaried jobs to 72, with one declining an offer, Klott said. Two of those to be hired were men, the rest were women, he said.

GM found the leading reasons people cite for taking a break from the workforce are childbearing, elderly parent care or trailing a spouse in their career, Klott said. Some take a hiatus as short as two years up to 24 years.

In Diver’s case, she got a bachelor of science degree in mechanical engineering from Western Michigan University in 1992. In May of that year, she started as a release engineer at then-GM-owned Delco Electronics in Indiana. She left the job when she became pregnant in 2000 to raise a family.

“I always wanted to work again,” Diver said. “I knew I’d probably return, but I didn’t have a plan and I didn’t know when.”