Administrative Assistant Sr

US Silica•Pacific, MO

About The Position

Provides superior administrative support across a functional area, including maintaining confidential records, processing transactions, preparing reports, presentations and correspondence, following organizational and departmental procedures, facilitating group logistics, and handling special projects. In the plant setting, the role coordinates communication and administrative workflows across Operations, Maintenance, EHS, HR, purchasing, accounting and other departments. It maintains accurate records and trackers, coordinates meetings and employee activities, supports plant reporting, and helps managers focus on safety, reliability and production performance. The role also identifies administrative inefficiencies and recommends practical improvements while handling confidential information appropriately.

Requirements

At least 3 years of progressively responsible administrative, operations support or coordination experience.
Ability to coordinate across functions, organize competing priorities, maintain accurate records and follow through without direct supervisory authority.
Strong written and verbal communication skills, sound judgment, discretion and initiative, and ability to escalate issues appropriately.
Proficiency with Microsoft Excel, Word, Outlook and PowerPoint.
Ability to learn payroll, purchasing, reporting and plant action-tracking systems.

Nice To Haves

Manufacturing or industrial experience preferred.
Experience supporting payroll, HR, purchasing, reporting or continuous improvement preferred.
Ability to simplify workflows and document standard processes.

Responsibilities

Coordinate cross-functional communication among Operations, Maintenance, EHS and the Plant Manager, documenting and communicating priorities, decisions, owners and deadlines.
Organize and distribute daily DDS meeting notes, action registers, status updates and shift or departmental communications; maintain accurate PIMS administrative records and follow-up visibility.
Develop and maintain plant communication tools, shared trackers, calendars and reporting routines.
Collect updates from department owners, identify missing information or overdue actions, and elevate unresolved gaps to the appropriate manager or Plant Manager.
Coordinate meetings, site visits, training, employee events and cross-department initiatives; prepare agendas, materials and action summaries.
Provide administrative and project coordination to help department managers prioritize field presence, safety, reliability and production performance.
Serve as the primary plant administrative contact for payroll support, timekeeping, attendance, PTO, union dues, employee records and routine HR coordination in partnership with HR.
Coordinate hourly recruiting logistics, onboarding, employee changes, benefits communications, required reporting and employee engagement activities.
Support purchasing and accounting processes, including requisitions, open purchase orders, invoices, check requests, accrual support and vendor documentation; maintain trackers and communicate exceptions.
Coordinate plant reporting and information flow for product inventory, daily production and downtime, storeroom receiving discrepancies, customer service and logistics as assigned.
Maintain electronic records, standard work instructions and office supplies; support visitor and vendor reception, mail, shipping and Concur.
Identify recurring administrative inefficiencies, recommend practical improvements and standardize routine tasks for continuity and future delegation.
Handle confidential employee, operational and business information appropriately; refer decisions and sensitive matters to the authorized manager or HR.
Perform additional duties as assigned.