The typical seasonal entry-on-duty period for Fire Island National Seashore is April - Sept, but can be variable during these months due to weather conditions, project needs, or funding. Anticipated Entry on Duty: April - May 2026 NOTE: OPM has identified this position as eligible for an exception to the typical 1039 hour season. This exception allows up to 1560 hours which may extend the season dates noted above. See additional information section for details.