Tucson is in search of a new human resource boss.

Lani Simmons, the former human resources director, abruptly resigned Friday, City Manager Richard Miranda said in a two-sentence memo.

Simmons’ resignation letter lacked specific reasons why she left a position where she received a $128,277 base salary.

However, the letter did reference the struggles of protecting public service principals within a “volatile political and economic environment.”

It also implied the city had lapsed into “formalism.” Simmons described the condition as one where an institution places a “higher value on the appearance of professionalism, rather than honesty and best practices.” She said when that occurs, employees suffer.

Simmons had worked with the city since January 2012.

Human resources deputy director Curry Hale will act as interim director.

Contact reporter Darren DaRonco at 573-4243 or ddaronco@azstarnet.com. Follow on twitter @DarrenDaRonco​