About Us Must be within 30 mins of facility for call Shift - FT Days - 10 hours - 4 10s Rotating days. 7am- 5:30pm Call reqirements - rotating call. 3 in 6 week period 5:30-6:30am Experience Required - 2 years experience in cardiac sono Certifications required - RCS or RDCS Here & we promote the well-being of all individuals, families, and communities. And is the largest not-for-profit healthcare system in Texas that empowers you to live well.