Lizette Delgado-Polanco resigned effective April 26 as head of the Schools Development Authority (SDA).

She was replaced the next day by Manuel Da Silva, who was named the SDA’s acting chief executive officer by Gov. Phil Murphy. Da Silva has been employed at the SDA since 2010, serving most recently as the organization’s vice president of construction operations. Before the SDA, he was the chief operating officer of M. Alfieri Co., Inc., a commercial property-management firm based in Edison.

Read Delgado-Polanco’sresignation letter.

The Schools Development Authority pays 100 % of the cost, and oversees the construction and design process, of school buildings in 31 districts formerly known as “Abbott districts” in the state. It also contributes grants to non-Abbott districts, known as regular operating districts, paying up to 40 % of eligible costs.