"tackle upon" is not a grammatically correct phrase in written English.
The word "tackle" means to deal with or handle, and "upon" typically means on or onto. Therefore, using them together would be redundant. Instead, you could use "tackle" or "address" alone to convey the same meaning. Example: "We need to address/tackle the issue of climate change immediately."
Mr. Kaspersky said his company tackled Flame upon the request of the International Telecommunication Union, an agency of the United Nations.
But by focusing on the nuts and bolts of commercial excellence, firms can develop relatively straightforward, repeatable strategies for diagnosing problems in diligence and quickly tackling them upon securing ownership, opening up a new set of viable targets among the large number of companies that underperform commercially.
And when Telamon, Hylas's old friend, comes on land with the crows, can Hylas confront and tackle his feelings upon discovering his friend is actually one of his enemies?
Now join endurance bibliophiles from around the web as we tackle and comment upon David Foster Wallace's masterwork over the summer of 2009," we are cajoled by the persuasive people at Infinite Summer.
The Big One, cancer, is still a bit too complicated to tackle, with subtypes upon subtypes each bearing their own numbers and measures, but Wicks thinks cancer won't be an impossible challenge forever.
Everyone is busy working 24/7 to prepare the proposal, and they don't have time to tackle or insist upon a formal joint venture agreement.
At this time, Shapiro was also considering what topic his next film should tackle, when he came upon an article online about a service you can hire to stalk you and take surveillance photos.
It grew out of a series of design iterations that have metamorphosed it from a restricted-use laboratory system into one called upon to tackle the most demanding tasks.
In many ways, Warren's proposed program shows what a future president ― perhaps, the senator herself after 2020 ― could do to tackle corporate power quickly upon taking office.
