Senior Administrative Specialist - On-Site (Contract)

CorSource; Richland (WA); On-site; USD 42,000 - 65,000; Part time

Job summary

CorSource is seeking an Administrative Assistant III for an on-site, contract role in Richland, WA. The position supports department leadership and staff with confidential administrative duties and cross-functional coordination.

Responsibilities include document control, travel and expense processing, onboarding support, reporting, and office management. The role requires strong discretion, advanced MS Office skills, and the ability to handle tight deadlines in a fast-paced environment.

Qualifications

• 5+ years in progressive administrative roles with leadership responsibilities.
• Strong discretion with sensitive information.
• Proficient in Word, Excel, PowerPoint, Outlook.
• Able to manage complex projects and meet tight deadlines.

Responsibilities

• Maintain documents per recordkeeping requirements.
• Prepare travel authorizations and coordinate travel arrangements.
• Monitor qualifications and ensure compliance/maintenance.
• Support onboarding activities for new staff.
• Schedule performance appraisals and prepare personnel records.
• Prepare reports and presentations for senior leadership.
• Provide office management support (phones, visitors, calendars).
• Triage inquiries promptly and professionally.
• Distribute mail/faxes and handle sensitive items appropriately.
• Manage office supplies and inventory within budget.
• Coordinate facility/equipment needs and maintenance.
• Serve as admin SME for action tracking/AR processes; close items.
• Maintain department SharePoint site and search for improvements.
• Initiate contract requisitions/changes and funding coordination.

Skills

Discretion

Communication

Organization

Time management

Independent decision-making

Attention to detail

Education

High school diploma or GED

Tools

MS Office

SharePoint

Access

Job description

CorSource is seeking an Administrative Assistant III for an on-site, contract role in Richland, WA. The position supports department leadership and staff with confidential administrative duties and cross-functional coordination.

Responsibilities include document control, travel and expense processing, onboarding support, reporting, and office management. The role requires strong discretion, advanced MS Office skills, and the ability to handle tight deadlines in a fast-paced environment.