Anyone can be appointed to cabinet you don’t have to be elected.
The governor-general appoints to the Cabinet persons chosen by the prime minister—
John A. Macdonald once half-jokingly listed his occupation as
cabinet maker; while there are no legal qualifications of the potential ministers, there are a number of conventions that are expected be followed. For instance, there is typically a minister from each
province in Canada, ministers from
visible minoritygroups, female ministers and, while the majority of those chosen to serve as ministers of the Crown are
Members of Parliament, a Cabinet sometimes includes a
senator, especially as a representative of a province or region where the governing
party won few or no
ridings. Efforts are further made to indulge interest groups that support the incumbent government and the party's internal politics must be appeased, with Cabinet positions sometimes being a reward for loyal party members.[
citation needed]
en.wikipedia.org
If Kenney really wanted to balance the representation of ministers in his cabinet he could appoint his friend in Edmonton Mike Nickel. Or preferably someone more thoughtful just to demonstrate that he cares.