I am currently the only planner within a large Subsea Engineering department responsible for the creation and maintenance of sometimes small sometimes extremely large project plans using Primavera P6. I have also used MS Project previously aswell. I have up to 10 plans for which I am responsible for and liaise with the team leads and Project Engineers to gain weekly updates.
Links:
[1] http://www.planningplanet.com/category/project/various-projects-0
[2] http://www.planningplanet.com/category/skills-expertise/all-aspects-project-planning
[3] http://www.planningplanet.com/category/job-role/assistant-project-manager-project-planner
[4] http://www.planningplanet.com/taxonomy/term/9601
[5] http://www.planningplanet.com/category/industry/oil-gas-power
[6] http://www.planningplanet.com/category/skills-expertise/small-amount-project-management
[7] http://www.planningplanet.com/category/region/europe-eu/united-kingdom-euuk