To upload a new profile picture please login to BrightTALK (www.BrightTALK.com) and go to 'My BrightTALK' (https://www.brighttalk.com/mybrighttalk/knowledge-feed). This will take you to the page visible in the screenshot below. Here you can click on "Add a Photo" and you will be asked to upload a photo from your computer. Once this is uploaded, your face is automatically detected within the photo and centered within the profile picture.
To change your profile photo, please follow the above steps, clicking on the camera icon over your old photo to upload a new photo.