POWER OF ATTORNEY
The undersigned, as a Section 16 reporting person of Qualys, Inc. (the “Company”), hereby constitutes and appoints Bruce Posey, as the undersigned’s true and lawful attorney-in-fact to:
The undersigned hereby ratifies and confirms all that said attorney-in-fact and agents shall do or cause to be done by virtue hereof. The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, is not assuming, nor is the Company assuming, any of the undersigned’s responsibilities to comply with Section 16 of the Securities Exchange Act of 1934 (as amended).
This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the Company and the foregoing attorney-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 25th day of August, 2023.
Signature: /s/ Thomas Berquist
Print Name: Thomas Berquist