Tandem Diabetes Care | 80,258 followers on LinkedIn. Tandem Diabetes Care, a global insulin delivery and diabetes technology company, manufactures and sells advanced automated insulin delivery systems that reduce the burden of diabetes management, while creating new possibilities for patients, their loved ones, and healthcare providers. The Company’s pump portfolio features the Tandem Mobi system and t:slim X2 insulin pump, both of which feature Control-IQ advanced hybrid closed-loop technology. Tandem is the #1 recommended insulin pump brand by people living with diabetes, four years and counting.