After 14 months without an executive director, the Pittsburgh Water and Sewer Authority board has decided to bring in a management company to oversee daily operations.

The board voted this morning to invite management companies to compete for the work. Board members said they expect a management firm to run the authority for 12 to 18 months, at which time the board will look at the situation again.

In December 2010, Michael Kenney resigned the executive director’s job amid questions about his ties to a vendor providing a controversial line warranty service to customers.

Two senior employees have shared management duties in the difficult period that’s followed — a period that’s seen a judge rule the line warranty program illegal and the agency’s storm-water management practices criticized after the deaths of four people in a flash flood in August.

In recent months, city Councilman Patrick had criticized fellow PWSA board members for dragging their feet on replacing Mr. Kenney. Other board members defended the delay, saying they weren’t sure whether they wanted to hire a new executive director or bring in a management company.