"Attacking duties" refers to tasks or responsibilities that involve being aggressive and proactive in seeking out opportunities or targets. Full definition
The way the movie has it, this is one of the most dangerous precincts in the country, but Mike and Brian attack their duties with relish. (hoopla.nu)
A former business owner herself, she ran a children's store franchise called The Elephant's Trunk before working for Corcoran — and thus attacks her duties with the work ethic of an entrepreneur. (inc.com)
That is probably because despite playing for perhaps a less fashionable club, Debuchy appears to be able to balance defensive and attacking duties perfectly. (caughtoffside.com)