Postdoctoral Research Scientist Jobs in USA with Visa Sponsorship
Postdoctoral research scientist roles are among the most visa-friendly positions in U.S. academia and industry. Universities and research institutions routinely sponsor H-1B visa, J-1 visa, and O-1 visas, and many postdoc positions qualify as cap-exempt, letting you skip the annual H-1B lottery entirely.
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Get Access To All JobsINTRODUCTION
The laboratory of Dr. Kai Zhou at the Buck Institute for Research on Aging seeks a hands-on mass spectrometry scientist or postdoctoral researcher to establish and operate a structural mass spectrometry platform. We welcome candidates with expertise in native mass spectrometry, crosslinking mass spectrometry, HDX-MS, or intact-protein/top-down analysis. Our laboratory investigates how protein structure, interactions, and assembly change with aging and disease. Projects include intrinsically disordered proteins (IDR/IDPs), protein complexes, and ribosomes. The successful candidate will take substantial ownership of instrument operation, method development, data quality, and biological interpretation. The role offers opportunities to develop new workflows and pursue scientific questions in collaboration with protein biochemists, structural biologists, and computational researchers.
LOCATION
Location: Novato, CA (on-site)
Responsibilities
- Establish, optimize, and run structural-MS workflows, including low-flow LC for bottom-up proteomics and crosslinking, and a separate LC workflow for intact-protein and native MS analysis
- Develop native-MS and/or crosslinking-MS methods to characterize protein-complex composition, stoichiometry, interactions, and structural changes. Explore intact-complex analysis and complex-down MS workflows where experimentally feasible
- Prepare and evaluate samples, including buffer exchange, desalting, crosslinking, digestion, and enrichment as appropriate; optimize native SEC or rapid online buffer exchange while assessing sample integrity and complex stability
- Optimize ionization, ion transmission, precursor isolation, and fragmentation for heterogeneous proteins and assemblies; assess instrument performance, troubleshoot problems, and coordinate maintenance and training with vendor specialists
- Establish quality-control standards, reproducible protocols, and reliable workflows for increasing sample throughput, including automated or unattended acquisition, batch QC, carryover checks, and reproducible switching between native and denaturing analyses
- Analyze and interpret spectra with appropriate controls, uncertainty assessment, and validation; distinguish solution-state interactions from source-induced dissociation or adducts and assess crosslink identifications and proteoform/PTM assignments as appropriate
- Maintain clear experimental records and organize raw data, analysis files, and protocols
- Collaborate on experimental design, train colleagues, and contribute to publications and consortium deliverables
BASIC QUALIFICATIONS
Required
- PhD in analytical chemistry, biochemistry, biophysics, structural biology, or a related discipline. Experienced master’s-level applicants with substantial independent instrument-operation and method-development experience may be considered for an appropriate staff appointment
- Demonstrated hands-on operation of a high-resolution mass spectrometer, including acquisition-method setup, performance assessment, and troubleshooting
- Substantial practical expertise in at least one of the following: native MS, crosslinking MS, HDX-MS, or intact-protein/top-down MS
- Experience connecting sample preparation, acquisition settings, data analysis, and experimental controls to reliable conclusions
- Strong scientific reasoning, careful documentation, and the ability to work independently and collaboratively
PREFERRED QUALIFICATIONS
- Native electrospray, native MS, intact-protein/top-down or complex-down analysis, or multistage fragmentation
- Crosslinker selection, reaction optimization, enrichment, crosslinked-peptide identification, and false-discovery-rate assessment
- Recombinant protein purification, sample-integrity assessment, and troubleshooting aggregation or heterogeneity
- Analysis of disordered proteins, heterogeneous assemblies, or ribonucleoprotein complexes
- Workflow automation, quantitative analysis, or scripting for reproducible data processing; familiarity with crosslinking or proteoform-analysis software. Experience supporting complementary bottom-up proteomics or metabolomics applications is also welcome
Candidates need not have experience in every listed technique. We value demonstrated depth, ownership, and the ability to learn complementary approaches.
COMPENSATION, BENEFITS & ADDITIONAL INFORMATION
- Annual salary range: $75,920 - $85,500, commensurate with qualifications and experience
- Generous benefits package including health insurance, paid parental leave, vacation/sick, and 401(k) with 5% employer match
- Visa sponsorship (J visa) is available for this position
ABOUT THE BUCK INSTITUTE
Our success will ultimately change healthcare. At the Buck, we aim to end the threat of age-related diseases for this and future generations by bringing together the most capable and passionate scientists from a broad range of disciplines to identify and impede how we age. We are an independent, non-profit institution located in Marin County, CA, with the goal of increasing human healthspan, or the healthy years of life. Globally recognized as the pioneer and leader in efforts to target aging—the number one risk factor for diseases including Alzheimer’s, Parkinson’s, cancer, macular degeneration, heart disease, and diabetes—the Buck seeks to help people live better longer. We are an equal-opportunity employer and strive to create an atmosphere where diversity of identity, experience, and background is welcomed, valued, and supported. Candidates who contribute to this diversity are strongly encouraged to apply.
TO APPLY
- Please submit a CV, a brief cover letter, and contact information for three references
- Postdoctoral applicants, please include your completed or expected PhD date
- In your cover letter, describe one representative MS project and specify:
+ The instrument and techniques you used
+ Which sample-preparation, acquisition, troubleshooting, and analysis steps you personally performed
+ A technical problem you solved and how you verified the solution
+ Your scientific contribution and the resulting publication, method, dataset, or operational improvement
INTRODUCTION
The laboratory of Dr. Kai Zhou at the Buck Institute for Research on Aging seeks a hands-on mass spectrometry scientist or postdoctoral researcher to establish and operate a structural mass spectrometry platform. We welcome candidates with expertise in native mass spectrometry, crosslinking mass spectrometry, HDX-MS, or intact-protein/top-down analysis. Our laboratory investigates how protein structure, interactions, and assembly change with aging and disease. Projects include intrinsically disordered proteins (IDR/IDPs), protein complexes, and ribosomes. The successful candidate will take substantial ownership of instrument operation, method development, data quality, and biological interpretation. The role offers opportunities to develop new workflows and pursue scientific questions in collaboration with protein biochemists, structural biologists, and computational researchers.
LOCATION
Location: Novato, CA (on-site)
Responsibilities
- Establish, optimize, and run structural-MS workflows, including low-flow LC for bottom-up proteomics and crosslinking, and a separate LC workflow for intact-protein and native MS analysis
- Develop native-MS and/or crosslinking-MS methods to characterize protein-complex composition, stoichiometry, interactions, and structural changes. Explore intact-complex analysis and complex-down MS workflows where experimentally feasible
- Prepare and evaluate samples, including buffer exchange, desalting, crosslinking, digestion, and enrichment as appropriate; optimize native SEC or rapid online buffer exchange while assessing sample integrity and complex stability
- Optimize ionization, ion transmission, precursor isolation, and fragmentation for heterogeneous proteins and assemblies; assess instrument performance, troubleshoot problems, and coordinate maintenance and training with vendor specialists
- Establish quality-control standards, reproducible protocols, and reliable workflows for increasing sample throughput, including automated or unattended acquisition, batch QC, carryover checks, and reproducible switching between native and denaturing analyses
- Analyze and interpret spectra with appropriate controls, uncertainty assessment, and validation; distinguish solution-state interactions from source-induced dissociation or adducts and assess crosslink identifications and proteoform/PTM assignments as appropriate
- Maintain clear experimental records and organize raw data, analysis files, and protocols
- Collaborate on experimental design, train colleagues, and contribute to publications and consortium deliverables
BASIC QUALIFICATIONS
Required
- PhD in analytical chemistry, biochemistry, biophysics, structural biology, or a related discipline. Experienced master’s-level applicants with substantial independent instrument-operation and method-development experience may be considered for an appropriate staff appointment
- Demonstrated hands-on operation of a high-resolution mass spectrometer, including acquisition-method setup, performance assessment, and troubleshooting
- Substantial practical expertise in at least one of the following: native MS, crosslinking MS, HDX-MS, or intact-protein/top-down MS
- Experience connecting sample preparation, acquisition settings, data analysis, and experimental controls to reliable conclusions
- Strong scientific reasoning, careful documentation, and the ability to work independently and collaboratively
PREFERRED QUALIFICATIONS
- Native electrospray, native MS, intact-protein/top-down or complex-down analysis, or multistage fragmentation
- Crosslinker selection, reaction optimization, enrichment, crosslinked-peptide identification, and false-discovery-rate assessment
- Recombinant protein purification, sample-integrity assessment, and troubleshooting aggregation or heterogeneity
- Analysis of disordered proteins, heterogeneous assemblies, or ribonucleoprotein complexes
- Workflow automation, quantitative analysis, or scripting for reproducible data processing; familiarity with crosslinking or proteoform-analysis software. Experience supporting complementary bottom-up proteomics or metabolomics applications is also welcome
Candidates need not have experience in every listed technique. We value demonstrated depth, ownership, and the ability to learn complementary approaches.
COMPENSATION, BENEFITS & ADDITIONAL INFORMATION
- Annual salary range: $75,920 - $85,500, commensurate with qualifications and experience
- Generous benefits package including health insurance, paid parental leave, vacation/sick, and 401(k) with 5% employer match
- Visa sponsorship (J visa) is available for this position
ABOUT THE BUCK INSTITUTE
Our success will ultimately change healthcare. At the Buck, we aim to end the threat of age-related diseases for this and future generations by bringing together the most capable and passionate scientists from a broad range of disciplines to identify and impede how we age. We are an independent, non-profit institution located in Marin County, CA, with the goal of increasing human healthspan, or the healthy years of life. Globally recognized as the pioneer and leader in efforts to target aging—the number one risk factor for diseases including Alzheimer’s, Parkinson’s, cancer, macular degeneration, heart disease, and diabetes—the Buck seeks to help people live better longer. We are an equal-opportunity employer and strive to create an atmosphere where diversity of identity, experience, and background is welcomed, valued, and supported. Candidates who contribute to this diversity are strongly encouraged to apply.
TO APPLY
- Please submit a CV, a brief cover letter, and contact information for three references
- Postdoctoral applicants, please include your completed or expected PhD date
- In your cover letter, describe one representative MS project and specify:
+ The instrument and techniques you used
+ Which sample-preparation, acquisition, troubleshooting, and analysis steps you personally performed
+ A technical problem you solved and how you verified the solution
+ Your scientific contribution and the resulting publication, method, dataset, or operational improvement
See all 1,655+ Postdoctoral Research Scientist Jobs
Sign up for free to unlock all listings, filter by visa type, and get alerts for new Postdoctoral Research Scientist roles.
Get Access To All JobsTips for Finding Visa Sponsorship as a Postdoctoral Research Scientist
Verify your cap-exempt employer status early
Many postdoc positions at universities, affiliated research institutions, and nonprofit research organizations qualify for cap-exempt H-1B filing. Confirm this with the HR or international office before accepting an offer, since it removes the lottery from your timeline entirely.
Document your research contributions for specialty occupation
USCIS scrutinizes whether postdoc roles meet the specialty occupation standard. Compile your publications, grants, and conference presentations before you apply. A strong record makes it harder for a request for evidence to challenge your petition.
Target institutions with active J-1 exchange programs
Many research universities hold J-1 exchange visitor program designations and sponsor postdocs directly through their international offices. This route bypasses I-129 filing entirely, though you should check whether the two-year home residency requirement applies to your country and field.
Search Migrate Mate for verified sponsoring research employers
Filter postdoc listings on Migrate Mate to find employers with verified LCA filing history for research scientist roles. This shows you which institutions have actually sponsored workers in your field, not just those that mention visa support in job descriptions.
Request the prevailing wage tier before the offer stage
Use the OFLC Wage Search to look up the prevailing wage for your occupation and location before salary discussions. Postdoc wages at Level I often fall below market rates, and your employer's LCA must certify pay at or above the applicable DOL wage level.
Align your PERM timeline with your postdoc contract length
If your institution plans to sponsor you for a green card via PERM, the labor certification process can take a year or more. Start conversations about EB-2 or EB-3 sponsorship within the first six months of your postdoc, not when your contract is about to expire.
Frequently Asked Questions
Do postdoctoral research scientist positions qualify as specialty occupations for H-1B purposes?
Yes, in most cases. Postdoc roles require at minimum a doctoral degree in a directly related field, which satisfies USCIS's specialty occupation definition. The main risk of an RFE arises when the job description is written too broadly. A tightly drafted position description that ties specific duties to your Ph.D. discipline significantly reduces that exposure.
Can a postdoc employer file an H-1B outside the annual lottery cap?
Many can. Universities, nonprofit research organizations, and government research entities often qualify as cap-exempt employers. This means your employer can file an H-1B petition at any time of year without entering the lottery. Confirm cap-exempt status directly with the institution's international scholars office before you count on this pathway.
What visa types do postdoctoral research scientists most commonly use?
The three most common are H-1B, J-1, and O-1B. J-1 is the fastest route for short postdocs since institutions with an exchange visitor program can sponsor you without filing through USCIS. H-1B offers more long-term flexibility and dual intent. O-1B suits researchers with an exceptional publication record or competitive grant awards.
Does the two-year home residency requirement affect J-1 postdocs?
It can. The two-year home residency requirement under INA Section 212(e) applies when your J-1 is government-funded, your home country appears on the Exchange Visitor Skills List, or your program is government-funded. If it applies, you must return home for two years or obtain a 212(e) waiver before changing to H-1B or applying for a green card.
Where can I find postdoctoral research scientist positions with confirmed visa sponsorship?
Migrate Mate lists postdoc and research scientist roles from employers with verified sponsorship history, so you're not guessing from vague job description language. Searching by role and location shows institutions that have filed LCAs for comparable positions, which is a reliable signal that they're equipped to sponsor international candidates.
What is the prevailing wage requirement for sponsored Postdoctoral Research Scientist jobs?
U.S. employers sponsoring a visa must pay at least the prevailing wage, which is what workers in the same role, area, and experience level typically earn. The Department of Labor sets this rate to make sure companies aren't hiring foreign workers simply because they'd accept lower pay than a U.S. worker. It varies by job title, location, and experience. You can look up current prevailing wage rates for any occupation and location using the OFLC Wage Search page.