You have not answered my question. I've asked what software you're running. At best the answer provided is extremely vague and as such, an accurate response cannot be provided.
Office is not really limited to just Windows 7, as @mooms said above, post 7 -> 10 upgrade, Office will still run. The only issue is that some versions such as 2010 are EOL/no longer supported. According to the Windows Compatibility Center, Office 2013, Office 2010, and Office 2007 are compatible with Windows 10.
If your workplace is unable to provide you with a copy of Office 2016/2019 or Office 365, try using LibreOffice - which is compatible with Microsoft Office.
Your best course of action would be the standard practices of backing up all your important data first and foremost, such as your User folder. I would then format the Windows 7 drive, install Windows 10 on the SSD, and enter the key at some point. After you're on Windows 10 1909 (current as of this post), get all the necessary updates, then transfer your backed up data back onto the computer, and reinstall your needed software. The reason I recommend this method is because on very rare occasions I have seen minor issues when upgrading from an existing Windows 7/8/8.1 to 10. The clean install would work best. Of course, the better your hardware (we are lacking that information in this thread) the better your experience will be.