The national security services company Altamira Technologies Corp. has been acquired by an investor group led by the venture capital firm ClearSky to enhance growth opportunities.

Terms of the deal, which was announced on July 24, were not disclosed.

Altamira, which is based in Northern Virginia, provides data and cyber analytics, and software and other engineering capabilities to its customers, which include a number of agencies in the intelligence community, the Army and Air Force, U.S. Cyber Command and Special Operations Command, the Department of Homeland Security and more.

Altamira said it has been growing at more than 20 percent the past four years.

“We are very excited by the opportunity that this new partnership will provide to continue to drive strong organic growth, invest in innovative new solutions, as well as for strategic acquisitions,” Ted Davies, CEO of Altamira, said in a statement. “We have carefully constructed a unique platform built to scale and support core national defense and intelligence missions and are enthused that our investors share our vision for the future.”

ClearSky’s investor group includes McNally Capital and Nio Advisors.

With the investment, ClearSky Managing Director Peter Kuper and the firm’s Chairman Joseph Wright are joining Altamira’s board. Ward McNally, managing partner at McNally Capital, is also joining the board.

Altamira’s financial adviser on the deal was KippsDeSanto & Co.