Babysitter Needed

I'm looking for someone who is reliable and trustworthy to watch my son (6 months old ) in our home at least three days a month (Wed - Fri) with some other days as needed. Every other month will be at least six days (Wed - Fri with a week off between). My spouse and I are both in law enforcement so our schedules vary depending on court and rotating shifts. Coverage needed will be from morning to possibly evenings. Depending on the week coverage will be 730 a. m/ 8 a.m. to 630 p.m. and or 1030 a.m. to 830 p.m. CPR certified is a must.