ISSS, DSO and PDSO Explained: Who Handles Your F-1 and OPT

What You Should Know First

ISSS is the office; DSO and PDSO are job roles inside it that SEVP recognises.
Only a DSO can touch your SEVIS record: I-20s, OPT recommendations, CPT, reduced course loads, transfers and travel signatures.
DSOs advise on status rules but are not your immigration lawyer and cannot change a USCIS decision.
After graduation you still need the DSO: the OPT recommendation, STEM OPT I-983 review and SEVP Portal problems all go through them.

ISSS: the office

Most U.S. schools group international student advising into one office. The name varies: International Student and Scholar Services (ISSS), International Student Services (ISS), Office of International Students (OIS), Office of International Students and Scholars (OISS) or Office of Global Engagement. Whatever the sign on the door says, this is where F-1 and J-1 students go for immigration paperwork, orientation, and advice on maintaining status.

ISSS staff who are not DSOs can answer general questions and book appointments but cannot update SEVIS. If an email signature or a web page lists someone as an "international student advisor" without the DSO title, confirm whether they are a DSO before relying on them for an I-20 or a reporting deadline.

Sources: Designated School Officials

DSO: the person who can change your SEVIS record

A Designated School Official is an employee the school has named on its Form I-17 petition to SEVP and who has access to the Student and Exchange Visitor Information System (SEVIS). Federal regulation requires a DSO to be a U.S. citizen or permanent resident and limits the number of DSOs a school may designate. Everything that changes your record in SEVIS is a DSO action.

What a DSO does for an F-1 student, by stage.
Stage	DSO actions
Before arrival	Issues the initial I-20 and SEVIS ID; registers you in SEVIS after you arrive and enrol
During study	Travel signatures on the I-20, reduced course load approvals, program extensions, change of major or level, SEVIS transfers, CPT authorisation
OPT	Enters the OPT recommendation in SEVIS and issues the OPT I-20 you file with Form I-765; updates employer information
STEM OPT	Reviews and signs the I-983 training plan, issues the STEM OPT I-20, records the six-month validation and employer changes
Problems	Records unemployment, reinstatement requests, status corrections, SEVIS termination and the reasons for it

Sources: Designated School Officials; 8 CFR 214.3: Approval of schools and designated school officials; Optional Practical Training for F-1 Students

Vinay’s practical note

A DSO must act within the regulations. They cannot backdate an OPT recommendation, approve CPT that does not fit the degree, or keep a record active after you fall out of status. When a DSO says no, the answer is usually the rule, not the person.

PDSO: the lead DSO

Each SEVP-certified school has exactly one Principal Designated School Official. The PDSO is the school’s point of contact with SEVP, keeps the school’s certification current, submits the I-17 updates that add or remove DSOs, and can do everything a DSO can do. Students rarely need the PDSO directly. You might be referred to the PDSO for an unusual case, a complaint about a DSO decision, or when the school’s certification itself is in question.

Searches for "PDSO" often come from students whose I-20 is signed by the PDSO and who wonder whether that matters. It does not: a PDSO signature and a DSO signature carry the same weight on an I-20.

Sources: 8 CFR 214.3: Approval of schools and designated school officials

What ISSS and DSOs cannot do

DSOs are immigration compliance officers for the school, not attorneys for the student. They cannot represent you before USCIS, file your I-765, speed up a pending OPT case, argue an RFE, or give legal advice about a denial, a visa refusal or a change of status to H-1B. For those, the DSO will usually refer you to the school’s immigration counsel or to an outside attorney.

They also cannot see your USCIS case. SEVIS shows the OPT recommendation and, once USCIS approves it, the EAD dates; it does not show the receipt status in between. For that you use USCIS Case Status Online or a tracker.

Sources: Designated School Officials; SEVP Portal Help

DSO: SEVIS record, I-20, OPT and STEM recommendations, CPT, reporting.
Attorney: USCIS filings beyond the I-765, RFEs, denials, H-1B and green card strategy.
You: filing the I-765 on time, SEVP Portal updates, tracking the USCIS case.

When to contact ISSS after graduation

Your relationship with the DSO continues through OPT and STEM OPT. Contact ISSS within 10 days of starting a job, changing employers, moving or losing a job, so the DSO can confirm the SEVIS record matches the SEVP Portal. Ask for a new I-20 before travelling if the travel signature is older than six months during OPT. Ask the DSO before the STEM OPT application window opens, because the I-983 review takes time, and again at the 6, 12, 18 and 24 month validation points.

If the SEVP Portal locks you out, ISSS can reset access. If the SEVP Portal and the I-20 disagree about an employer or an end date, the DSO corrects SEVIS; you cannot.

Sources: SEVP Portal Help; Optional Practical Training for F-1 Students

New job, employer change, move or unemployment: within 10 days.
Travel on OPT: travel signature under six months old.
STEM OPT: I-983 review before the 90-day filing window, validations every six months.
Portal lockout or SEVIS mismatch: ISSS, not USCIS.

Your Action Checklist

Know the name and email of your assigned DSO.

Confirm the person updating your SEVIS record holds the DSO title.

Report employment and address changes to the DSO within 10 days.

Use an attorney, not the DSO, for USCIS disputes beyond the I-765.

Common Mistakes to Avoid

Emailing a general ISSS inbox for a deadline-critical I-20 without confirming a DSO received it.
Expecting the DSO to see or speed up a pending USCIS case.
Assuming a PDSO signature is required on an I-20.

Frequently Asked Questions

What does ISSS stand for?

International Student and Scholar Services, the office that advises international students at a U.S. school. Other schools call it ISS, OIS, OISS or the international office.

What is the difference between a DSO and a PDSO?

Both can update SEVIS and sign an I-20. The PDSO is the lead DSO who manages the school’s SEVP certification and the list of DSOs. Students usually work with a DSO.

Can a DSO see my OPT case status?

No. SEVIS shows the OPT recommendation and, after approval, the EAD dates. The USCIS receipt status in between is visible only through USCIS Case Status Online or your USCIS account.

Is a DSO an immigration lawyer?

No. A DSO advises on F-1 rules and manages the SEVIS record. Legal advice and representation before USCIS come from an attorney.

Official Sources

Rules can change. We checked this guide against the primary sources below; always open the current form instructions or agency page before acting.

ISSS, DSO and PDSO: Who They Are, What Each One Can Do for Your F-1 Status, and When to Contact Them