Customs and Border Protection
Physical Scientist (IRMS)
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Summary
Basic Requirement: You qualify for this position if you meet the basic requirement listed above and possess the experience or substitution of education, if applicable, as described below: A. Degree: physical science, engineering, or mathematics that included 24 semester hours in physical science and/or related engineering science such as mechanics, dynamics, properties of materials, and electronics. OR B. Combination of education and experience: education equivalent to one of the majors shown in "A" above that included at least 24 semester hours in physical science and/or related engineering science, plus appropriate experience or additional education. AND Experience: You qualify for the GS-13 grade level if you possess 1 year of specialized experience equivalent to at least the next lower grade level, performing duties such as: Running, maintaining, and troubleshooting high temperature conversion elemental analyzer (TC/EA) IRMS, combustion elemental analyzer (EA) IRMS, and gas chromatography (GC) IRMS instrument. Accurately measuring carbon, nitrogen, sulfur, oxygen, and hydrogen isotopic ratios across a range of matrices. Interpreting data results and drawing conclusions about the origin of a variety of trade commodities. Teaching and guiding journeyman scientists and other personnel in performance improvement of analytical skills. NOTE: Your resume must explicitly indicate how you meet this requirement, otherwise you will be found ineligible. Please see the "Required Documents" section below for additional resume requirements. Experience refers to paid and unpaid experience, including volunteer work done through National Service programs (e.g., Peace Corps, AmeriCorps) and other organizations (e.g., professional; philanthropic; religious; spiritual; community, student, social). Volunteer work helps build critical competencies, knowledge, and skills and can provide valuable training and experience that translates directly to paid employment. You will receive credit for all qualifying experience, including volunteer experience. You must meet all qualification requirements, including education if applicable to this position, subject to verification at any stage of the application process by 10/21/2026. The Office of Personnel Management (OPM) must authorize employment offers made to current or former political appointees. If you are currently, or have been within the last 5 years, a political Schedule A, Schedule C, Non-career SES or Presidential Appointee employee in the Executive Branch, you must disclose this information to the Human Resources Office. Background Investigation: U.S. Customs and Border Protection (CBP) is a federal law enforcement agency that requires all applicants to undergo a thorough background investigation prior to employment in order to promote the agency's core values of vigilance, service to country, and integrity. During the screening and/or background investigation process, you will be asked questions regarding any felony criminal convictions or current felony charges, the use of illegal drugs (e.g., marijuana, cocaine, heroin, LSD, methamphetamines, ecstasy), and the use of non-prescribed controlled substances including any experimentation, possession, sale, receipt, manufacture, cultivation, production, transfer, shipping, trafficking, or distribution of controlled substances. For additional information on the preemployment process, review the following link: Applicant Resources | CBP Careers Residency: There is a residency requirement for all applicants not currently employed by CBP. Individuals are required to have physically resided in the United States or its protectorates (as declared under international law) for at least three of the last five years. If you do not meet the residency requirement and you have been physically located in a foreign location for more than two of the last five years, you may request an exception to determine if you are eligible for a residency waiver by meeting one or more of the following conditions: Working for the U.S. Government as a federal civilian or as a member of the military A dependent who was authorized to accompany a federal civilian or member of the military who was working for the U.S. government Participation in a study abroad program sponsored by a U.S. affiliated college or university Working as a contractor, intern, consultant or volunteer supporting the U.S. government Probationary Period: All employees new to the federal government must serve a one year probationary period during the first year of his/her initial permanent federal appointment to determine fitness for continued employment. Current and former federal employees may be required to serve or complete a probationary period.
Major Duties
This position starts at a salary of $106,437.00 (GS-13, Step 1) to $138,370.00 (GS-13, Step 10). While serving as a Physical Scientist (IRMS), your duties may include: Handling complex problems and advancing technology independently and developing technical and technological advancements in Isotope Ratio Mass Spectrometry (IRMS). Conducting and investigating scientific, technical, and statistical work on quality-related applications as related to technical training, sub-sampling, methods, instrumentation, validations and verifications, test data and reports. Supporting all major aspects of the field laboratory, such as forensic and trade commodity analysis, with a concentration in source attribution/provenance studies. Testing and validating analytical methods and instrumentation, identifying equipment needs for the laboratory, as required, and evaluating instruments and test technologies. Developing and providing input on complex scientific and technical procedures and methods.
Requirements
You must be a U.S. Citizen to apply for this position Males born after 12/31/1959 must be registered with Selective Service Primary U.S. residency for at least three of the last five years (additional details below) All pre-employment processes will be conducted in English You may be required to pass a background investigation CBP follows the DHS Drug-Free Workplace Plan for drug testing procedures As an employee of CBP, you will be joining a workforce that is dedicated to accomplishing our mission while maintaining the trust of our Nation by strictly adhering to all government ethics standards. Your conduct will be subject to the ethics rules applicable to all Executive Branch employees, and to CBP employees specifically, as well as the criminal conflict of interest statutes. Once you enter on duty, these rules include obtaining approval for outside employment or business activity, to ensure such employment or business activity is not prohibited and does not interfere or conflict with performance of your official duties. Please review further details via the following link. DHS uses E-Verify, an Internet-based system, to confirm the eligibility of all newly hired employees to work in the United States. Learn more about E-Verify including your rights and responsibilities. Bargaining Unit: This is a bargaining unit covered position, represented under the National Treasury Employees Unions - NTEU. For local chapter contact information see Chapter Websites - National Treasury Employees Union - NTEU Drug testing is required
Required Documents
Your resume: A resume describing your job-related qualifications is required and will be used for the purpose of reviewing your qualifications and determining what training, if any, would be required when placed. A resume in English is required. It must contain your full legal name, phone number, relevant work history including a detailed description of your duties, the dates you performed those duties (MM/DD/YY), your hours worked per week, job title, as well as series, grade, and salary (if applicable). For additional required items, see the link. It is recommended that you upload your resume as a PDF instead of a Word document to ensure document quality. Ensure that your uploaded resume is not a password protected document, to include Office 365 passwords. Limit your resume to no more than two pages. The USAJOBS database will not allow an applicant to submit an application that includes a resume over two pages. Your responses to the job questionnaire: https://apply.usastaffing.gov/ViewQuestionnaire/13072981 Your transcripts: All applicants are required to submit a copy of your college transcript (unofficial is acceptable at this time; however, official copies will be required prior to entrance on duty) or a list of coursework with hours completed provided from the institution. If you are a current CBP employee within the position series announced, transcripts will not be required at the time of application; however, education will be verified if you are selected and you may be required to submit transcripts at that time. Education must be from an institution accredited by an agency recognized by the U.S. Department of Education. Education obtained from a foreign university or college is not creditable unless it has been evaluated by an organization that specializes in interpretation of education credentials. Note: If submitting documentation of an evaluation, transcripts are still required. For a listing of some accrediting agencies see NACES | Credentials Evaluations Provided by NACES Members. See https://www.accreditation.info/education-quality/usa-recognition.html for more information. Are you claiming special priority selection rights under the Agency Career Transition Assistance Program (CTAP), Interagency Career Transition Assistance Program (ICTAP), or the Reemployment Priority List (RPL)? You must submit a separation notice; your most recent SF-50 (noting your current position, grade level and duty location); a copy of your most recent performance rating; an agency certification that you cannot be placed after injury compensation has been terminated; an OPM notification that your disability annuity has been terminated; or a Military Department of National Guard Bureau notification that you are retired under 5 U.S.C. 8337(h) or 8456; or RPL registration documentation. Are you a current or former federal employee? If yes, it is recommended that you submit a copy of your SF-50(s) (Notification of Personnel Action) to support your experience. Examples of appropriate SF-50s include promotions, within-grade increases and accessions. Retired former federal employees are required to submit your retirement SF-50 and encouraged to submit your most recent annuity statement. Are you a current or former political Schedule A, Schedule C, Non-career SES or Presidential Appointee employee? Submit a copy of your initial and termination SF-50s.
How to Apply
To begin your online application, click "Apply Online" to create a USAJOBS account and follow the prompts or log in to your existing account. Your application packet must include a completed assessment questionnaire, a resume, and any applicable and/or required supporting documentation. Please see the "Required Documents" section for additional information. All application materials, including transcripts, must be in English. Applications and supporting documentation will not be accepted by mail or email. The address below is for inquiries only. You may apply more than once, but the most recent application is the only one that will be used. You must submit your resume, your online questionnaire, and any supporting documents by 11:59 PM Eastern Time on 10/21/2026. It is your responsibility to verify that any information entered or uploaded is received and is accurate. Human Resources will not modify or change any part of your application. Determining your eligibility and qualifications is dependent on the supporting documentation and information provided, which may impact your referral for further consideration. If a document is not legible, you will not be able to view it in your application and you must again upload it by the closing date Please upload your resume under the "Resume" document type. Any other relevant supporting documents should be uploaded under their appropriate document types as mentioned above. Only resumes up to a total of two pages will be accepted. Applicants with resumes exceeding two pages will be removed from consideration. Do not submit documents as a PDF Portfolios. You may submit a curriculum vitae (CV) and attach in the "other document" option. DHS offers competitive salaries and an attractive benefits package, including: health, dental, vision, life, and long-term care insurance; retirement plan; Thrift Savings Plan [similar to a 401(k)]; Flexible Spending Account; Employee Assistance Program; personal leave days; and paid federal holidays. Other benefits may include: flexible work schedules; tuition reimbursement; transportation subsidies; uniform allowance; health and wellness programs; and fitness centers. DHS is committed to employee development and offers a variety of employee training and developmental opportunities. For more information, go to the DHS Careers website and select "Benefits." Disabled veteran leave will be available to any Federal employee hired on or after November 5, 2016, who is a veteran with a service-connected disability rating of 30 percent or more. After CBP completes its hiring, the resumes of the remaining candidates referred for selection consideration may be shared with other DHS Components and other federal agencies. During the application process, you may choose to opt-in if you would like your name, application material, and assessment results to be shared. There is no guarantee of further consideration, and you can continue to explore other job opportunity announcements. The Fair Chance to Compete for Jobs Act prohibits the Department of Homeland Security and its Components from requesting an applicant's criminal history record before that individual receives a conditional offer of employment. In accordance with 5 U.S. Code § 9202(c) and 5 C.F.R § 920.201 certain positions are exempt from the provisions of the Fair Chance to Compete Act. Applicants who believe they have been subjected to a violation of the Fair Chance to Compete for Jobs Act, may submit a written complaint to [email protected]. View common definitions of terms in this announcement.