Permission to Use Sigma Logo

If you are an Sigma member, go to The Circle to download the chapter style guide and a JPEG file of the Sigma logo. If you would like a vector image of the logo or crest, complete the form included in the style guide and your request will be reviewed as soon as possible.

If you are not an Sigma member and would like to request use of Sigma's official logo, contact In your email, provide detailed information regarding your intended use. Permission to use the logo or crest is granted on a case-by-case basis, and reasonable notice should be given. Approvals are for one-time use only.

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International Nurses Day 2017 statement from STTI President Cathy Catrambone

STTI President Cathy Catrambone

In honor of International Nurses Day 2017, I offer my sincere thanks to STTI members worldwide for all you do every day to make a difference in the lives of our patients, families, communities and populations that we serve.  

We celebrate International Nurses Day on 12 May to mark the birthdate of Florence Nightingale, who said, “Were there none who were discontented with what they have, the world would never reach anything better.” You are living out that sentiment daily.  Thank you for your deep commitment to the nursing profession. Congratulations for providing compassionate care that is grounded in science, for addressing access and equity to health services, and for promoting healthy lives. I encourage everyone to reflect and take pride in the profound influence you have in advancing STTI’s world health mission.