Mission Support and Test Services, LLC

Senior Business Assistant

Posted Date 3 weeks ago(11/16/2023 7:40 PM)
Job ID
# of Openings
Location : City
Location : State/Province (Full Name)


Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administration (NNSA).  Our MISSION is to help ensure the security of the United States and its allies by providing high-hazard experimentation and incident response capabilities through operations, engineering, education, field, and integration services and by acting as environmental stewards to the Site’s Cold War legacy.  Our VISION is to be the user site of choice for large-scale, high-hazard, national security experimentation, with premier facilities and capabilities below ground, on the ground, and in the air. (See NNSS.gov for our unique capabilities.) Our 2,750+ professional, craft, and support employees are called upon to innovate, collaborate, and deliver on some of the more difficult nuclear security challenges facing the world today.  In this environment, the best ideas need to be voiced and every opinion matters.  As such, MSTS places great value on Diversity, Equity, and Inclusion and is committed to a diverse and equitable workforce, with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, and perspectives.

  • MSTS offers our full-time employees highly competitive salaries and benefits packages including medical, dental, and vision; both a pension and a 401k; paid time off and 96 hours of paid holidays; relocation (if located more than 75 miles from work location); tuition assistance and reimbursement; and more.  
  • MSTS is a limited liability company consisting of Honeywell International Inc. (Honeywell), Jacobs Engineering Group Inc. (Jacobs), and HII Nuclear Inc.


The Construction Support Department is looking for a high performing individual with an attention to detail to become our Senior Business Assistant and provide administrative support to the Construction Support Department.


Key Responsibilities

  • Perform a wide range of routine to complex administrative tasks with minimal supervision for Subcontractor Technical Representatives (STR).
  • Coordinate and maintain status of specialized documents, databases, records, and file directly related to management policies, general construction operations, and support of assigned organization in compliance with organizational, company, and NNSA regulations.
  • Coordinate requests for services and answer inquiries from other organizations or outside entities.
  • Monitor all follow-up actions required by supervisor/manager.
  • Perform the duties of coordinating training, badging, medical submittals for MSTS review for physicals and surveillance programs.
  • Analyze incoming correspondence and determine whether the document requires further action.
  • Compose, edit, and distribute outgoing correspondence.
  • Maintain up to date STR spreadsheets with current data.
  • Perform administrative tasks of a specialized nature to research, analyze, and develop projects and assignments.
  • Extract data from reference material; compile, analyze, and prepare or help prepare information for studies or reports.
  • Organize and assist in preparing material for meetings, presentations, and training sessions.
  • Schedule meetings and maintain both supervisor/manager and the organization calendar to ensure no conflicts.
  • Perform routine procurement functions for the group and track expenditures for delivery.
  • Assist the Subcontract Technical Representative as requested for IT services and equipment.
  • Monitor organization timekeeping activities and act as a proxy.
  • Review records and ensure are complete and ready for records archival.
  • Perform related work as assigned by supervisor.


Due to the nature of our work, US Citizenship is required for all positions.

  • High School diploma or equivalent, and at least 6 years of related experience.
  • Ability to observe, receive, and obtain information from all relevant sources.
  • Must be highly organized to develop specific goals and plans to prioritize, organize, and accomplish assigned projects.
  • Must possess excellent interpersonal skills and ability to communicate with internal and external contacts, representing the organization in a tactful, professional, and effective manner.
  • Ability to develop constructive and cooperative working relationships with team members and external stakeholders.
  • Proficiency in the use of software applications including Microsoft Office and general office equipment.
  • Proficient in the use of virtual and hybrid meeting technologies, such as Teams and WebEx.
  • Able to deal with pressure of handling multiple tasks, complaints, frequent interruptions, and time constraints.
  • Knowledge of basic math, grammar, spelling, and punctuation.
  • Able to communicate with all types of people in a tactful, professional, and effective manner while screening and maintaining confidentiality.
  • Able to follow oral and written instruction and follow through on all assignments.
  • The primary work location is designated at the Nevada National Security Site (located 65 miles northwest of Las Vegas).
  • The work schedule is designated as 4/10s, Monday - Thursday (subject to change).
  • Pre-placement physical examination, which includes a drug screen, is required. MSTS maintains a substance abuse policy that includes random drug testing.
  • Must possess a valid driver’s license.

Ability to obtain a HSPD-12 Personal Identity Verification credential under the Department of Energy Order 206.2, ‘Identity, Credential, and Access Management,’ and Supplemental Directive NNSA SD 206.2, ‘Implementation of Personal Identity Verification for Uncleared Contractors.’


MSTS is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other characteristics protected by law. MSTS is a background screening, drug-free workplace.


Annual salary range for this position is: $55,806.40 - $83,720.00.


Starting salary is determined based on the position market value, the individual candidate education and experience and internal equity. 


Sorry the Share function is not working properly at this moment. Please refresh the page and try again later.
Share on your newsfeed