Three years after buying its one-million-square-foot facility in Atlanta, Ga., colocation and managed service provider QualityTech secured investment to further expand the data center that is currently housing 200,000 square feet of raised floor.

"We've already built out 200,000 square feet. Now is time to add more," QualityTech EVP of Marketing Dan Kurtz said. "There's a demand for large colocation spaces, as well as managed services to go with that."

On Tuesday, QualityTech announced that growth equity firm General Atlantic had agreed to invest $150 million into the company - capital it planned to use for the Atlanta expansion, as well as improvements to its other facilities throughout the US, including Silicon Valley. Kurtz said QualityTech was planning to build out another 200,000 square feet in the Atlanta facility.

Besides the expansion, the company is going to focus resources on improvements to its Santa Clara, Calif., data center. "The demand out there is immediate," Kurtz said. "We'll continue to make any other improvements to existing facilities that we have."

QualityTech also owns four data centers in its home state of Kansas. Its other facilities are in Suwanee, Ga., Jersey City, N.J., New York City, Miami, Fla., and Indianapolis, Ind. Part of the new capital will go toward investigating expansion opportunities into new markets, Kurtz said.

The company's biggest growth driver continues to be demand for colocation space, followed by demand for its cloud-based hosting platform for enterprises.