procter & gamble – 1,943 employees

P&G Mason Business Center is the worldwide headquarters for its Oral Care, Personal Health Care, and Pet Care businesses. Four billion times a day, P&G brands touch the lives of people around the world.

luxottica retail – 1,856 employees

Headquarters for Lenscrafters, the largest optical retail chain in the world, and Sunglass Hut and Watch Station, the world’s leading retailer of sunglasses, watches, and accessories.

cintas corporation – 1,512 employees

Corporate headquarters for the number one manufacturer and distributor of uniform garments.

mason city schools – 1,184 employees

Local school district.

l3 – Harris Technologies – 712 employees

A first-rank engineering, development, and production company renowned for its expertise in the areas of space, missile electronics, infrared detection, communications, and electronic warfare.

mitsubishi electric automotive america – 671 employees

A subsidiary of Mitsubishi Electric Corporation, one of the top 50 largest manufacturing corporations in the world and a leading manufacturer of starters and alternators.

intelligrated – 705 employees

Intelligrated® is a leading North American-based, single-source provider of intelligent automated material handling solutions that drive fulfillment productivity for retailers, manufacturers and logistics providers around the world.

great wolf lodge – 438 employees

Rustic lodge and conference center with indoor waterpark, located next to Kings Island.

portion pac, inc. – 438 employees

Corporate headquarters of one of the largest foodservice companies in the U.S., specializing in single serving condiments.

lindner center of hope – 300 employees

The Lindner Center of HOPE offers a level of service to patients, families and referring physicians not typically found in health care today.