Baltimore

Testing Titan Prometric Plants Its Flag At Greenleigh In Middle River

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Published on March 11, 2026
Testing Titan Prometric Plants Its Flag At Greenleigh In Middle RiverSource: Google Street View

Prometric, the international testing company that runs licensure and certification exams around the globe, has shifted its corporate headquarters into a roughly 14,000-square-foot suite at Greenleigh in Middle River. The move drops a major corporate nameplate onto Baltimore County's 1,000-acre mixed-use campus and gives the development the kind of visible headquarters tenant it has been chasing.

As reported by the Baltimore Business Journal, the new space features a café and collaborative work areas set up for hybrid teams. The Business Journal also notes that the five-story office building has already landed three new corporate tenants so far this year, signaling that Greenleigh is starting to fill in.

Prometric framed the broader relocation in a press release announcing a move to the White Marsh area as part of a modernization of its workplace strategy, highlighting amenities such as a café-style gathering zone and larger meeting rooms, Prometric said. On its global site, Prometric now lists 6211 Greenleigh Avenue as the company’s corporate headquarters.

Greenleigh's pitch

Greenleigh is being marketed as a 1,000-acre mixed-use community with more than 3,300 planned residential units and nearly two million square feet of commercial space, according to the East County Times. St. John Properties' marketing materials add that the campus includes two Class A multi-story office buildings and that 6211 Greenleigh Avenue is a LEED Gold, roughly 99,540-square-foot building configured for suites and headquarters tenants, St. John Properties notes.

What it means for Baltimore County

Prometric’s arrival lines up with a broader flight to quality, where office users show a clear preference for modern, amenity-heavy buildings, a trend CBRE has documented in recent market analysis. The lease hands Greenleigh a marquee headquarters tenant to point to as it markets remaining suites and pitches the campus to other corporate users, and the Baltimore Business Journal reports the five-story building has already added multiple corporate tenants this year.

For Greenleigh’s developers, Prometric’s decision functions as a public vote of confidence that can accelerate additional leasing and help pull more office users to Middle River as the campus builds out. Expect more leasing headlines out of Greenleigh in the coming months as St. John and its partners keep working through the remaining office and residential inventory.