Adobe Illustrator. Your company logo should be a vector file. Image files can be "Placed" in Illustrator. Artwork created for printing can be drawn in Illustrator and saved as .ai, .eps, and .pdf files which can be imported into your printer's RIP. But, check with your print vendors and see what they require. This does not rule-out Photoshop, however Photoshop can be limited. So, it would be a good idea to have Photoshop and Illustrator loaded in your workstation with Illustrator being the go-to application.
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