The Meridian Group and Rockefeller Group have secured two office leases totaling 18,000 square feet at Boro Tower in Tysons, VA.

Williams Mullen, a full-service law firm, will lease 14,950 square feet starting in September. Hanwha, a global leader in defense solutions, will lease 2,768 square feet starting in June. Williams Mullen is relocating from a nearby office building in Tysons. It will occupy part of the Tower’s 16th floor. Hanwha, which is relocating its office from Crystal City, will occupy part of the Tower’s 18th floor.

Terry Reiley, Rosanne Richards, Anna Faktorow and Paterick Clark of CBRE represented The Meridian Group and the Rockefeller Group in the lease transaction. Savills’ Wendy Feldman Block and David Cornbrooks represented Williams Mullen in the deal, and JLL’s Adam Shreiner and Kelly Katz represented Hanwha.

Meridian and Rockefeller Group co-developed the Gensler-designed, 440,000-square-foot trophy office tower. The trophy building is now 80 percent leased, with about 89,000 square feet of office space remaining.