Glossary entry (derived from question below)
Persian (Farsi) term or phrase:
پس از انجام تعهد خدمت
English translation:
After fulfilling the obligation of service
Persian (Farsi) term
Australia
NAATI & ISO 17100 certified, MNZSTI
Native in: Persian (Farsi) 
Works in: Persian (Farsi) to English, English to Persian (Farsi)
پس از انجام تعهد خدمت
پس از انجام تعهد خدمت
Apr 30, 2023 04:27: Sophie Meis changed "Language pair" from "English to Persian (Farsi)" to "Persian (Farsi) to English"
Apr 30, 2023 06:51: Sophie Meis changed "Field (write-in)" from "Student loan" to "تعهد خدمت در ازای بهره‌مندی از تحصیلات رایگان در دانشگاه دولتی"
Proposed translations
Canada
B.A in translation
Native in: English
Works in: English, Persian (Farsi) to English, Spanish to English, and 5 more.
After fulfilling the obligation of service
Iran
Experienced Medical/Law/IT Translator
Native in: Persian (Farsi) (Variant: Iranian (standard))
Works in: English, Persian (Farsi) to English, English to Persian (Farsi), and 1 more.
After fulfilling the service commitment
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Note added at 1 hr (2023-04-30 05:34:39 GMT)
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تعهد خدمت
service commitment
http://barsadic.com/W?fid=39240
https://www.ir-translate.com/PU/Dictionary/WordPage.aspx?fid...
The title of paper: How to Comply with Scholarship Program Requirements
How To Fulfill Your Service Commitment
https://nhsc.hrsa.gov/scholarships/requirements-compliance
Iran
Corpus-based Translation
Native in: Persian (Farsi)
Works in: English to Persian (Farsi), Persian (Farsi) to English, Dari to English
After completing job obligations/commitments
Tech-savvy, detail-oriented | AVT, L10N
Native in: Persian (Farsi)
Works in: English to Persian (Farsi), Persian (Farsi) to English, Dari to English, and 1 more.
once the service period is fulfilled
This certificate is issued to entitle the holder to privileges contained therein in Iran, and shall bear no value if/when translated. The original degree and attachments appertaining thereto shall be awarded to the forenamed once the service period is fulfilled and debts are cleared.
From Translation of Legal Correspondence and Deeds (I) by Masoud Raee Sharif, SAMT Publishing House, p. 78 / ترجمه مکاتبات و اسناد (۱)، مسعود راعی شریف، انتشارات سمت، ص. ۷۸
+
http://prof.khuisf.ac.ir/images/Uploaded_files/Equivalents o...[4008873].DOCX
Türkiye
committed to quality & accuracy
Native in: Persian (Farsi)
Works in: English to Persian (Farsi), Persian (Farsi) to English, Turkish to Persian (Farsi), and 3 more.
upon fulfillment of the obligation to serve
veritas odit moras
Native in: Persian (Farsi) (Variant: Iranian (standard)) 
Works in: English, Persian (Farsi), English to Persian (Farsi), and 1 more.
Upon completing student loan repayment plan
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Note added at 3 days 4 hrs (2023-05-03 09:05:22 GMT)
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... The equivalent should be "at the end of the student loan repayment plan".
Also, " I assume تعهد خدمت is not defined in that document.
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Note added at 3 days 23 hrs (2023-05-04 04:27:10 GMT)
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And also it needs context, which is not provided
Discussion
https://studentaid.gov/manage-loans/repayment/plans
That's probably the closest you might find to تعهد خدمت in English, although some tweaking might help to get it closer.
https://fa.wikipedia.org/wiki/تعهد_خدمت_فارغ‌التحصیلان_دانشگ...،%20دانشجویان%20دانشگاه%E2%80%8Cهای%20دولتی,خود%20را%20به%20دولت%20بپردازند.
While in a document where تعهد خدمتis not defined (like the one below), using 'service' alone will not adequately specify the term and needs additional clarification.
https://www.heyvagroup.com/shownews/643/لیست-رشته-های-دارای-...
In both CONTEXTS, the MEANING is the same. However, the equivalents are different due to different contexts.