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Administrative Assistant II

Job in Lone Tree, Douglas County, Colorado, 80124, USA
Listing for: Sierra Nevada Corporation
Full Time position
Listed on 2026-06-12
Job specializations:
  • Administrative/Clerical
    Office Administrator/ Coordinator, Virtual Assistant/ Remote Admin, Business Administration
Salary/Wage Range or Industry Benchmark: 60000 USD Yearly USD 60000.00 YEAR
Job Description & How to Apply Below
## Administrative Assistant IIApplyremote type:
In office locations:
Lone Tree, COtime type:
Full time posted on:
Posted Todayjob requisition :
R0030041

Are you a tech-savvy administrative professional looking for your next challenge? Join our dynamic team as an Administrative Assistant II and become a vital partner to our Director and Vice President-level leaders. In this role, you’ll support top executives by expertly managing complex calendars, coordinating meetings and travel, preparing impressive reports and presentations, and ensuring seamless day-to-day operations. Your proactive approach and organizational skills will contribute directly to our company’s success.

The ISR (Intelligence, Surveillance & Reconnaissance), Aviation, and Security (IAS) business area is a leader in ISR and aviation, it is a leading prime manned and unmanned aircraft systems integrator for innovative, high-performance ISR and aviation systems. Its end-to-end Command, Control, Computers, Communications and Intelligence, Surveillance & Reconnaissance (C4

ISR) capabilities encompass design, integration, test, certification, ground/flight training and complete logistics support. IAS tailors solutions to customer cost, performance, and schedule requirements and designs to consistently exceed expectations – with an unrivaled record of on time and on (or under) budget deliveries.
** Responsibilities:
*** Efficiently manage complex inquiries from both internal and external sources.
* Prepare, consolidate, and route detailed reports and presentations.
* Create, edit, and manage complex spreadsheets to support various administrative tasks.
* Prepare and submit expense reports and purchase requisitions.
* Maintain databases and ensure accurate data entry in compliance with company policies.
* Coordinate business meals, on-site meetings, and events, including all logistics.
* Provide advanced support to IT and Facilities for conference room and public area maintenance.
* Manage calendars for senior leaders, including meeting and travel arrangements.
* Edit, format, and send communications, presentations, and documents.
* Act as a liaison between executives and internal/external stakeholders.
* Handle high-level administrative tasks with a focus on business operations.
* Support onboarding and training for new employees.
* Organize team-building and employee engagement activities.
* Handle confidential information with discretion.
* Assist in project planning, execution, documentation, and reporting.
* Support budget planning and vendor management.
* Sit at the front desk, support visitor check-ins, and manage office supplies.
* Provide backup support to the administrative team as needed.  
** Qualifications You Must Have:
*** High school diploma or equivalent.
* 3+ years of relevant experience in office administration or administrative support.
* Proficient in Microsoft Office Suite (Word, Excel, Outlook, Teams, One Note, SharePoint Online) and travel/expense platforms (e.g., Concur).
* General knowledge of administrative practices, including expense reporting, purchase requisitions, and coordinating meetings, events, and travel.
* Foundational knowledge of project management applications (e.g., Microsoft Project, Smartsheet) and ticketing systems (e.g., Service Now).
* Excellent communication, problem-solving, and organizational skills.
* Professional demeanor and ability to handle sensitive information with discretion.  
** Qualifications We Prefer:
*** Associate’s degree in Business Administration or related field.
* Experience in the Aerospace and Defense industry.
* Advanced knowledge of Workday or similar HRIS systems.
* Certifications such as PACE (Professional Administrative Certification of Excellence) or CAPM (Certified Associate in Project Management) are a plus.
* Experience with Concur Travel and Expense platform or other travel management systems.
* Experience working in a U.S. military or Department of Defense (DoD) environment.  
*
* Essential Functions:

*** Ability to lift up to 20 lbs regularly.
* Ability to sit or stand for extended periods.
* Proficiency with computers and office equipment.
* Manual dexterity for handling office supplies and…
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