You should use both the present and past tense when using action verbs on your CV:
Use the present tense in your personal statement and when describing the responsibilities of your current job
Use the simple past tense to describe your achievements
Here's an personal statement using the present tense:
Social Media Specialist with a BA in Marketing from Nottingham Trent University. Possess 2+ years of freelance experience leveraging social listening software, keyword research, and campaign planning to boost social media presence for consumer-oriented SMEs. Seeking a Social Media position with an active role in content creation and developing social media strategies.
The simple past tense (e.g., 'I received praise') is normally the appropriate tense to use when describing achievements or past jobs because it describes completed past actions.
Here's how the simple past tense looks on a CV work experience entry:
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