The phrase "since engaged in" is correct and usable in written English.
You can use this phrase to refer to an activity that started in the past and continues to the present. For example, "She has been living in the same town since engaged in her current job."
The entire UN system has since engaged in Rio+20 follow-up.
That former members of the organisation have since engaged in criminal activity, including murder, should be of no surprise.
Supporters in both camps have since engaged in a nasty public spat, leaking details about H.P.'s investigation.
The Bucks have since engaged in a full rebrand headed by Brooklyn-based design firm Doubleday and Cartwright.
It has since engaged in some inconclusive rounds of negotiations to return it to Syria in return for a peace treaty.
Taiwan and China have since engaged in numerous de facto government-to-government talks and greatly expanded people-to-people exchanges.
The post continued: "Construction costs have risen tremendously since engaging in the project back in early 2012 (due in some measure to ongoing Hurricane Sandy reconstruction efforts) and ultimately the location is no longer financially viable for us.
Behavioural activation may be of particular importance, since engaging in activities and relationships outside of the home environment has been found to be an important protective factor in adolescent offspring [ 25].
Since engaging in play is so important for normal social and physical development [ 102], the consensus-based criteria for good symptom control are more stringent than for older age-groups, with an emphasis on assessing and maintaining normal activity levels.
Since engaging in LTPA and consuming milk and dairy products are beneficial agents for sleep promotion, combining these two non-invasive prescriptions may more effectively help older adults suffering from DIS.
Tony O'Brian and Alex Rhinehart had been waiting for this moment since getting engaged in January 2010.
