Aecom Technology Corp. said Monday that it has agreed to acquire Newport Beach-based water systems engineering firm Boyle Engineering for an undisclosed sum.

The deal is a move by Aecom to bolster its water and wastewater offerings the company said in a statement.

Boyle has about 600 employees most of which are based either in the southeast and western U.S.

The Los Angeles-based engineering and consulting firm is expected to announce its first quarter earnings Tuesday.

The acquisition is subject to approval by Boyle shareholders as well as regulatory approvals.

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