CHELMSFORD, MASS. — Digital Federal Credit Union has purchased an office building located at 297 Billerica Road in Chelmsford for an undisclosed price. The three-story, 129,000-square-foot building features a state-of-the-art data center, outdoor grilling and seating area, training rooms, in-house café, and shower and locker rooms. The buyer plans to use the facility to accommodate its continued expansion. The property was built and formerly occupied by Kronos Inc., which recently relocated its global headquarters for Lowell, Mass. Mark Reardon, Peter Dominski, Alex Plaisted and Ben Roopenian of CBRE/New England represented the seller, Anchor Line Partners, on behalf of Kronos. Garry Holmes of R.W. Holmes Realty represented the buyer in the deal.