What specific attributes do you look for in a Technical Product Manager? How would one plan to move their career towards a technical PM role?

Good judgement or product instinct. Product Managers should make quick decisions with the available data. Product Managers should be able to distinguish between the asks and the true needs. In order to build a successful product, you need a good understanding of the market, the customer and potential.

The second skill is willingness to do what it takes to make your product successful. The role of the PM differs vastly between organizations, but even within your org you might have to wear a UX hat one day, marketing the next day and engineering on the third day.

The move towards a tech PM role depends where you start. For example, if you are an engineer, get more exposure to customers and gain more understanding of the market. Volunteer for product activities like creating your user experience, writing the product definition, etc. If you are in a non-technical role, getting a deep technical understanding of the product area is critical.