1. Project life cycle: A process engineer should be familiar with the different phases of a project life cycle, including conceptualization, feasibility, design, construction, commissioning, and operation.

2. Typical growth ladder: A process engineer should understand the typical growth ladder in the process industry, including entry-level engineer, senior engineer, lead engineer, project manager, and director.

3. Importance of the process department and its roles: A process engineer should understand the importance of the process department and its roles in a project, including process design, optimization, simulation, and troubleshooting.

4. How to interact with multiple disciplines: A process engineer should know how to interact with multiple disciplines like electrical, mechanical, piping, instrumentation, and civil to ensure the smooth execution of a project.

5. Process major deliverables: A process engineer should be familiar with the major deliverables in a process project, including process flow diagrams (PFDs), piping and instrumentation diagrams (P&IDs), equipment specifications, Philosophies, and operating manuals.

6. Different simulation software used: A process engineer should be proficient in using different simulation software used in the process industry, such as Aspen HYSYS, ProSim, UniSim, and ChemCAD.

7. Heat and mass transfer: A process engineer should have a solid understanding of heat and mass transfer principles and their applications in the process industry.

8. Process safety: A process engineer should be knowledgeable about process safety and understand the importance of safety regulations, hazard identification, and risk analysis.

9. Process control and instrumentation: A process engineer should be familiar with process control and instrumentation systems, includingn distributed control systems (DCS), programmable logic controllers (PLCs), and field instrumentation.

10. Process optimization: A process engineer should have knowledge of process optimization techniques, including statistical process control (SPC), design of experiments (DOE), and lean manufacturing.

These are some of the key things that a process engineer should know to be successful in their role.