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6AM City

Senior Diagnostic Scientist

Nevada, IA · On-site

$85K - $117K/yr

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 ...

Mission Support and Test Services, LLC

Technologist

NV · On-site

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 ...

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How much do nnss jobs pay per year?

As of Jul 28, 2026, the average yearly pay for nnss in the United States is $124,724.00, according to ZipRecruiter salary data. Most workers in this role earn between $107,500.00 and $140,000.00 per year, depending on experience, location, and employer.

What is the difference between Nnss vs Emergency Medical Technician (EMT)?

AspectNnssEmergency Medical Technician (EMT)
Required CredentialsCertification or license specific to Nnss roles, often including specialized trainingState-certified EMT license, CPR certification, and basic life support training
Work EnvironmentHealthcare facilities, clinics, or specialized medical settingsAmbulances, emergency scenes, hospitals
Industry UsageHealthcare, medical servicesPre-hospital emergency care, ambulance services
Common Search/ComparisonNnss vs EMTEmergency Medical Technician (EMT)

While Nnss and EMT roles both involve healthcare and emergency response, Nnss typically refers to specialized healthcare support roles within medical facilities, whereas EMTs focus on providing pre-hospital emergency care. Both require certification, but EMTs are specifically trained for emergency situations outside of healthcare facilities.

What are common challenges faced by professionals working at the Nevada National Security Site (NNSS), and how are they addressed?

Professionals at the NNSS often work in highly regulated environments where safety, security, and confidentiality are paramount. Common challenges include adhering to strict safety protocols, managing sensitive information, and working on complex, multidisciplinary projects with diverse teams. These challenges are addressed through comprehensive training, strong teamwork, and ongoing professional development. Employees also have access to robust support systems and clear communication channels to ensure compliance and collaboration.

What is an NNSS job?

An NNSS job typically refers to a position at the Nevada National Security Site (NNSS), a U.S. Department of Energy facility focused on nuclear security, defense research, and environmental management. Jobs at NNSS span various fields, including engineering, security, emergency response, and scientific research. Employees contribute to national security initiatives, nuclear stockpile stewardship, and other critical missions. Many positions require security clearances and specialized expertise in fields like radiation safety, explosives testing, or cybersecurity.

What are the key skills and qualifications needed to thrive as an NNSS (National Nuclear Security Site) professional, and why are they important?

To thrive as an NNSS professional, you need a strong background in nuclear science, engineering, or a related technical field, often supported by a relevant degree and security clearance. Familiarity with radiation detection equipment, data analysis software, and compliance with DOE safety protocols is essential. Strong problem-solving abilities, attention to detail, and effective teamwork are vital soft skills. These competencies ensure safe, secure, and compliant operations in a highly regulated and sensitive environment.

What are NNSS?

NNSS stands for Nevada National Security Site, a U.S. government facility located in Nevada that is primarily used for nuclear testing, research, and development. The site supports national security programs, including nuclear stockpile stewardship, emergency response training, and environmental management. Employees at NNSS may work in areas such as engineering, science, security, and environmental monitoring. The facility is managed by the U.S. Department of Energy's National Nuclear Security Administration (NNSA) and plays a key role in ensuring the safety and reliability of the nation's nuclear arsenal.
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Nnss jobs near you
Infographic showing various Nnss job openings in the United States as of July 2026, with employment types broken down into 98% Full Time, and 2% Part Time. Highlights an 94% Physical, 4% Hybrid, and 2% Remote job distribution, with an average salary of $124,724 per year, or $60 per hour.

Lead Audit Manager, Internal Audit (Manager I)

Mission Support and Test Services, LLC

North Las Vegas, NV • On-site

$96K - $126K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 21 days ago

Job description


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.
  • 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.

Responsibilities
The Nevada National Security Sites (NNSS) is a $1B annual operation performing highly technical national security work for the government; NNSS is managed and operated by Mission Support and Test Services, LLC, a joint venture of Honeywell, Amentum, and Huntington Ingalls Industries. NNSS is seeking a highly qualified and experienced audit leader for the position of Internal Audit (IA) Lead Audit Manager (Manager I) in Las Vegas, NV. This position is responsible for managing a team of three, responsible for the financial, procurement, and corporate audit work portfolio of the annual audit plan. The Lead Audit Manager reports directly to the IA Chief Audit Executive (CAE).
Key Responsibilities
  • Report directly to the Chief Audit Executive (CAE) and support execution of the internal audit function's strategic objectives.
  • Engage with Senior Directors and functional leaders to assess risk areas and to develop part of the annual NNSS Audit Plan. Lead the Internal Audit Team in executing plan.
  • Develop and execute a comprehensive, risk-based audit plan covering financial, contract, corporate, and other audit areas as needed.
  • Manage audit staff across multiple levels, from senior principals to staff-level employees, ensuring audits are completed on time and that workpapers and analyses are thoroughly reviewed and finalized.
  • Conducts and/or coordinates audits and/or investigations of a complex nature.
  • Direct, manage, and lead audits of financial processes, including reporting, internal controls, and compliance with applicable accounting standards and regulations.
  • Direct, manage, and lead audits of contract lifecycle activities, including procurement, vendor management, billing, and compliance with contractual terms.
  • Supervise and conduct audits of corporate functions, such as HR, IT, Legal, and Operations, to assess governance, risk management, and control effectiveness.
  • Oversee and, as necessary, lead audits in operational, information technology (IT), and program areas based on organizational risk priorities.
  • Evaluate the adequacy and effectiveness of internal controls and recommend improvements to mitigate financial, operational, and compliance risks.
  • Review and communicate audit findings and recommendations to execute leadership and other key stakeholders, ensuring clarity, accuracy, and actionable insights.
  • Partner with the CAE to oversee and maintain the Quality Assurance Improvement Program (QAIP) ensuring conformance with professional internal audit standards and continuous improvement of audit practices.
  • Coordinate and lead internal support of external audits (e.g., Office of Inspector General and Government Accountability Office).
  • Direct and/or lead management advisory or special reviews, such as internal management request reviews and fraud, waste, and abuse investigations.
  • Assist the CAE in organizing and facilitating quarterly Board of Managers' audit committee meetings.
  • Support the CAE in executing special projects and high-priority initiatives, as needed.
  • Review workpapers in the audit management tool to ensure quality of analysis and evidence is sufficient, reliable, relevant, and useful. Delegate audits to employees and verify progress and validate quality at completion.
  • Ensure audit project activities and workpapers are reviewed and closed out timely.
  • Monitor and validate the timely remediation of audit findings. Work across the business and ensure adequate steps and actions are taken by the business functions to close out the Corrective Action Plans (CAPs).
  • Recruit, select, orient, and train employees, by maintaining a safe, secure, and legal work environment, and developing personal growth opportunities.
  • Accomplish staff results by communicating job expectations; planning, monitoring, and appraising job results; coaching, counseling, and disciplining employees; developing, coordinating, and enforcing systems, policies, procedures, and productivity standards.
  • Create an environment where employees feel safe to raise issues, empowered to address issues, and supported to resolve issues.
  • Mentor staff on the quality-of-service interactions and the quality of deliverables and time management requirements.
  • Build relationships with government oversight customers.
  • Maintain quality service by enforcing quality and customer service standards; analyzing and resolving quality and customer service problems; identifying trends; and implementing system improvements.
  • Maintain professional and technical knowledge by staying current on state-of-the-art practices; and participating in professional societies, such as the IIA, as appropriate.
  • Demonstrate leadership commitment to environment, safety, health, and quality policies and procedures. Assure that appropriate procedures, training, equipment, warnings, and tools are provided to employees to permit work to be performed safely. Take immediate action to correct reported or observed unacceptable behaviors.

Qualifications
  • Bachelor's degree or equivalent training and experience, plus a minimum of 11 years of related and progressively responsible experience.
    • Highly Preferred: Bachelor's degree in Finance, Accounting, Business, Data Analytics, Information Systems, or a related field from an accredited institution.
  • Must have 11 years of related and progressively responsible experience.
  • Required Certification: Must possess at least one of the following certifications (please upload certificate when applying):
    • Certified Public Accountant (CPA)
    • Certified Internal Auditor (CIA)
    • Certified Information Systems Auditor (CISA)
    • Certified Fraud Examiner (CFE)
    • Certified IG Auditor (CIGA)
  • Demonstrated experience managing an auditing function or audit team.
  • Knowledge of professional auditing standards, principles, practices, and techniques, such as the Global Internal Audit Standards.
  • Strong interpersonal skills with demonstrated ability to interact with staff at all levels.
  • Superior written and oral communication skills with demonstrated experience in preparing and delivering presentations and audit reports.
  • Audit experience in public accounting or federal government environment preferred.
  • Prior experience with waste, fraud, and abuse investigations preferred.
  • Personnel management experience.
  • Ability to enhance productivity and performance through appropriate mentoring, training, and alignment of incentives.
  • Demonstrated ability to be innovative and have effective problem-solving skills.
  • Ability to make and communicate decisions based upon limited information.
  • Demonstrated superior organization, planning, and time management skills.
  • Demonstrated ability to formulate and track actionable recommendations and initiatives to closure.
  • The highest standards of conduct and integrity are expected in past work experience.
  • Adopt and use AI tools to advance organizational processes and procedures.
  • Primary work location will be at the Losee Road facility in North Las Vegas, Nevada (candidates must be willing to relocate if not local, relocation package available).
  • Flexible work schedules available such as 4/10, 5/8, or 9/80's can be negotiated with the manager (hybrid schedule; 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.

MSTS is required by DOE directive to conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Applicants offered employment with MSTS are also subject to a federal background investigation to meet the requirements for access to classified information or matter if the duties of the position require a DOE security clearance. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause a clearance to be denied or terminated by DOE, resulting in the inability to perform the duties assigned and subsequent termination of employment. In addition, Applicants for employment must be able to obtain and maintain a DOE Q-level security clearance, which requires U.S. citizenship, at least 18 years of age. Reference DOE Order 472.2, "Personnel Security". If you hold more than one citizenship (i.e., of the U.S. and another country), your ability to obtain a security clearance may be impacted.
Department of Energy Q Clearance (position will be cleared to this level). Reviews and tests for the absence of any illegal drug as defined in 10 CFR Part 707.4, "Workplace Substance Abuse Programs at DOE Sites," will be conducted. Applicant selected will be subject to a Federal background investigation, required to participate in subsequent reinvestigations, and must meet the eligibility requirements for access to classified matter. Successful completion of a counterintelligence evaluation, which may include a counterintelligence-scope polygraph examination, may also be required. Reference 10 CFR Part 709, "Counterintelligence Evaluation Program."
MSTS is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, 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: $126,984.00 - $203,174.40.
Starting salary is determined based on the position market value, the individual candidate education and experience and internal equity.

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