ClickUp's Sydney headquarters is set to open in December, and the company plans to hire at least 200 people over the next three years to fill sales, support, business operations, and engineering roles.
Slattery joins ClickUp from Zendesk, where he worked as enterprise sales leader.
He previously worked in sales at Salesforce, had an earlier stint in sales at Zendesk, and was New Zealand country manager at Movember.
"ClickUp is one of the fastest-growing SaaS companies in the world and we see Australia as a critical market as we look to grow our footprint across the APAC region, and help companies improve productivity.
"We have already received a strong response to the news of our expansion from existing and new customers in Australia, and we look forward to growing our team and customers to provide a more localised experience in the APAC region."