Question 1

Does Mersana Therapeutics sponsor green cards?

Accepted Answer

Yes. Mersana Therapeutics has filed 2 PERM labor certification applications with the Department of Labor, with 2 certified. The median processing time from filing to decision has been 442 days.

Question 2

What is the current PERM processing time?

Accepted Answer

The DOL processing time from PERM filing to decision typically ranges from 6 to 18 months. This does not include the prevailing wage determination (1–6 months) or the recruitment period (2–3 months) that happen before filing. For Mersana Therapeutics, the median processing time from filing to decision has been 442 days. See the processing time chart above for year-over-year trends.

Question 3

How long does it take to get a green card through Mersana Therapeutics?

Accepted Answer

The full employer-sponsored green card timeline depends on three stages: PERM labor certification (6–18 months), I-140 petition with USCIS (4–6 months, or 15 days with premium processing), and adjustment of status or consular processing. For applicants from countries with visa backlogs like India and China, the wait for a visa number after I-140 approval can add years. The total process from start to green card typically takes 1–5+ years.

Question 4

What triggers a PERM audit?

Accepted Answer

The DOL may audit a PERM application if certain risk factors are present: layoffs within 6 months of filing, the foreign worker having an ownership interest in the company, job requirements that exceed the norm for the occupation, foreign language requirements, or combination occupations. An audit requires additional documentation but does not mean the case will be denied.

Question 5

What is Mersana Therapeutics's PERM approval rate?

Accepted Answer

Mersana Therapeutics has a 100% PERM approval rate across 2 total applications (2 certified, 0 denied, 0 withdrawn). The national average PERM approval rate is approximately 85%. Note that withdrawn cases are not counted in the approval rate calculation.

Year	Filings	Certified	Denied	Withdrawn	Median Processing Days
2024	1	1	0	0	484
2022	1	1	0	0	399

Job Title	Salary	Location	Filed	Decision	Days	Status
Principal Associate Scientist, Analytical Chemistry G-100-24071-789365	$112,000	Cambridge, MA	Mar 11, 2024	Jul 8, 2025	484	Certified
Senior Associate Scientist, Biology/Immuno Oncology A-22343-71035	$108,410	Cambridge, MA	Dec 30, 2022	Feb 2, 2024	399	Certified-Expired

Mersana Therapeutics — Green Card PERM Data

Mersana Therapeutics PERM & Green Card Filings

PERM Filings by Quarter

PERM Processing Time by Year

All PERM Filings

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