The deadline to nominate a company for the Minnesota 2016 Top Workplaces honor has been extended until March 25.

The Star Tribune is again teaming with Pennsylvania research firm WorkplaceDynamics for the Top Workplaces honor. Nominees agree to have WorkplaceDynamics survey employees on a number of factors that determine satisfaction. Those organizations whose results meet the national standard qualify for regional Top Workplaces lists across the country.

In 2015, WorkplaceDynamics surveyed 1.5 million employees at 7,000 organizations across the country. Minnesota scored the highest of the program's 45 regions in workplace satisfaction.

The confidential surveys measure organizational health such as company values, execution, leadership and culture; employees' job satisfaction; and employees' engagement such as motivation, desire to stay and willingness to recommend their workplace to others.

To qualify, employers must have at least 50 employees and agree to the survey. The companies are not charged or compensated for participating.

The employers are then ranked solely on the scores generated by employee responses.

If you know of a Minnesota company or nonprofit organization with 50 or more employees that deserves to be considered for this year's Top Workplaces, submit your nomination at startribune.com/nominate or call 612-605-3306.

Employees at participating companies will be surveyed through March by WorkplaceDynamics. A special section showcasing the Top Workplaces will be published in June.