WILMINGTON, MA — Proto Pac Engineering will expand into a 42,872 sq. ft. building that more than doubles the EMS company's current space.

The contract assembler has signed a lease for 301 Ballardvale St., in Wilmington, on the same campus as its current 20,000 sq. ft. plant. The new site includes an additional 10,000 sq. ft. for future expansion.

Proto Pac was founded in 1968 and serves the NPI and prototype EMS market.