"a highly involved" is a correct and usable phrase in written English.
It means that someone is very actively engaged in what is happening. For example, "Mr. Smith was a highly involved member of the local food bank."
Harriet became a highly involved stepmother.
It often involves synthesizing the work of other news outlets with his staff's original reporting and tips from a highly involved readership.
Sears brought on Mr. D'Ambrosio after three years of having an interim chief executive; Mr. Lampert has always been a highly involved chairman.
The downside is that you've now got a highly involved, engaged and vocal community of customers to manage as soon as the first pre-order comes in.
These contracts affect both the capacity adaptation and the production planning level, giving rise to a highly involved medium- and short-term bi-level (hierarchical) decision problem.
Product design is a highly involved, often ill-defined, complex and iterative process, and the needs and specifications of the required artifact get more refined only as the design process moves toward its goal.
In addition to the usual cost cutting, Internet.com's acquisitions are leveraged by tight focus on Internet technology business and a geeky, highly involved audience.
These guys will have a full-time highly involved chaperone in all of their activities".
When regressing ratings of attractiveness on brain activation, we observed activation in forebrain substrates, notably the nucleus accumbens, a forebrain nucleus highly involved in reward processes.
The D.C. encampment is close to Browne's heart for reasons beyond his own political sympathies: His goddaughter and a close friend are highly involved with Occupy Washington DC.
Temporary or "visiting partners" who will be asked to become highly involved with a particular "batch" or YC class based on their particular expertise.
