Pros
I was a late career experienced hire who worked for several years in a technical service group. When oil prices crashed, budgets, projects and technical services were cut, and lots of senior people were let go because there was no longer any work to do. From my perspective, severance timing and procedures were very generous and humane. I was lucky in that being near the end of my career the loss of my position was not as disastrous as it was to the younger staff affected. For earlier career professionals, company training courses and access to experts and mentors is top notch. Short term training assignments at other offices are also sometimes available. Prior to the price decline, there were numerous opportunities to apply for expatriate positions around the globe. Once prices stabilize, and the company completes its divestments, restructuring and absorption of BG, I suspect foreign opportunities will again be available. The new Houston offices are very nice, although adoption of an open plan is annoying and distracting. Flexible work hours and a 9/80 schedule were appreciated. However, when necessary, long hours can be required, but may be compensated later. My colleagues were generally nice, helpful, and very intelligent. I never had a problem with any member of management to whom I was exposed. They were all kind, fair and technically competent.
Cons
As others consistently note, there is a considerable amount of bureaucracy, with multiple reviews and processes required for every project. This is no different than other major companies. One unique thing within Shell is the increased importance of cultivating one's professional network within the company for continued success. It was confided to me that management, when determining ranking and performance ratings, takes into account if others in the organization know of you, and what their opinions are. As a warning to earlier career professionals, re. Shell and most other majors, be aware that once one reaches age 50 one becomes increasingly vulnerable to industry downturns, particularly if one is at a higher salary grade on a technical ladder through either promotion or transfer back to technical from a management position. One should not assume one will be able to remain employed past 55. Also, strive to never make an enemy in management, as I have repeatedly observed they will always seek revenge during the next layoff.