You should provide 3 references when a hiring manager asks.
Ideally, at least 1 reference should be someone you reported to recently.
The other 2 references could be colleagues or someone who you managed recently.
Keep in touch with your references. Let them know you are looking for a job. Provide them with a copy of your current resume so they have the information on hand. Let them know about the job you are applying for and any other helpful information before they are contacted. It’s important your references know someone may be calling them. Never blindside a reference.
Plan ahead. The time to ask for a reference letter from your manager is when you leave a company.
Keep your reference list current and up to date with the latest titles and contact information.
Choose the right people to use as references. They should be individuals who communicate well and know your accomplishments and abilities. They should be willing to provide information and be easily contacted.
Prepare your job references when you write your resume. Don’t wait until you are asked.
Have your reference list with you when you go to job interviews, but don’t offer it unless asked.
Don’t list references on your resume.
Always thank your references for their help when you are hired!