If you run an immigration or mobility program, changing firms is not just a vendor move. Done badly, it can mean missed expiries, messy audits, shaken trust from the people whose right to work depends on you, and business impacts like delayed start dates, blocked travel, and stalled projects. Done well, it means fewer fire drills, better employee experience, and cleaner updates for your leadership.

When you move immigration work from one firm to another, the impact shows up in individual cases: the employee whose green card is mid‑process, the manager trying to keep a start date, the H‑1B visa holder already nervous about their next extension. If you start by centering the visa-dependent employees, the rest of the transition decisions fall into place.

1. People and communication: Can you explain “who has my case” in one sentence?

Employees and hiring managers mostly want three things:

• Who is handling my case now
• What, if anything, is changing for me
• Whether my timing or risk has changed

Before you send any announcement, set a few simple rules you can turn into plain‑language answers.

PERM (employment‑based green card) example

Internal rule:

• Any green card case where the prevailing wage request (PWD) was filed before July 1 stays with Firm A through PERM approval and I‑140.
• Any case where the PWD is not filed by July 1 moves to Firm B.

Using the PWD as the line works because it locks in the wage and role assumptions the green card process will rely on.

How does that sound to an employee:

• “Your green card was started in April, so Firm A will stay on your case through your I‑140 approval. Firm B will handle anything that happens after that.”
• “While Firm A helped with your onboarding, your green card process will start with Firm B, using their questionnaires and portal.”

If your program is not this structured yet, you can start simpler (for example, “anything already filed stays, anything not filed moves”) and tighten the rules over time. The win is having a rule at all, not getting it perfect on day one.

H‑1B example

Internal rule:

• Any H‑1B case that was started before July 1 stays with Firm A through filing and decision.
• Any H‑1B case started on or after July 1 goes to Firm B.

“Started” should tie to how your program is supposed to run, like the date your team is scheduled to kick off extensions (for example, a set number of months before expiry) or the point when a case is opened in your normal new‑hire or amendment workflow. If your process today is more informal, use this transition as a chance to move toward clear, repeatable steps.

How does that sound to an employee:

• “Your extension is already in progress with Firm A, so nothing about that filing has changed. Your next extension will be handled by Firm B.”
• “Your transfer request came in after July 1, so Firm B will prepare and file that case. Here is how you will work with them.”

To make this real and repeatable:

• Run a live, recorded session for sponsored employees where you walk through a few concrete scenarios and show which firm is responsible in each one.
• Update manager FAQs and internal links so there is one obvious “start a case” path, even if you route work differently in the background.
• Create a simple rule for when someone emails the “wrong” firm (who forwards it, who confirms it is picked up, and how you track it).

Quick self‑check: pick three real employees and write one sentence for each: who has their case now, who will have it next, and whether their timing changes. If you get stuck, pause the announcement and clarify your rules first.

2. Data and files: Will the responsible firm and your team have what they need?

Once you know what you are going to tell people, make sure the underlying facts match the story. That means being clear about what actually moves, and which system your team will trust for dates and status after a certain point.

Think in three buckets.

Bucket 1: Active cases that are moving now

Examples:

• H‑1B extensions, amendments, and transfers that have not been started before your cutover date.
• Cases where an I‑140 priority date just became current, and the adjustment will be filed by the new firm.

What you send for these: the working file, not just a list. For H‑1Bs, that means prior petitions and approvals, LCAs, I‑94s, and any past RFEs and responses. For adjustment cases, that means the I‑140 approval, underlying PERM or I‑140 copy, and key notes about dependents, travel plans, or timing constraints. This lets the new firm pick up where the last firm left off instead of restarting from zero.

Bucket 2: Active cases that finish with the old firm but matter later

Examples:

• A green card case filed last quarter by Firm A that will support an adjustment filing through Firm B later.
• An H‑1B amendment filed before the transition that affects max‑out timelines.

What you send for these: the “finished” record you will rely on later—PERM approval, I‑140 approval, H‑1B approvals, RFEs and responses, plus a short note on any quirks (for example, periods out of status or prior denials). That way, when you or Firm B touch the case in a year, no one has to reconstruct history by digging through old emails.

Bucket 3: Closed or dormant cases that might “wake up”

Examples:

• A PERM audit notice is issued a year after approval.
• A site visit or internal review that requires you to show historical compliance.

What you send for these: a clean archive of your team, and the new firm can actually use if something surfaces. You do not need every email, but you do need the documents you would want in front of you on a short deadline: PERM audit files, H‑1B Public Access Files (PAFs), and evidence of timely withdrawals for former employees, for example. The employer, not the firm, ultimately owns these obligations, so you want those records accessible even if you change vendors again later.

On the systems side, decide which platform is the “source of truth” for expiries and case status from a specific date forward, and make sure HR can still run the reports they rely on (upcoming expiries, open cases by type, green card pipeline).

Before you call the transition done, do a few spot checks:

• One green card case that will stay with Firm A through I‑140 approval.
• One green card case where Firm A has already obtained I‑140 approval, and Firm B will handle future adjustment or consular work.
• One H‑1B case that moved to Firm B under your rule, including its PAF.

Ask the firm that owns the next step in each case to show you what they see in their system. At the same time, pull those same cases from your HR reports. If they cannot answer basic questions or your data does not line up, you know exactly where to tighten.

3. Risk, SLAs, and governance: what will be different this time for people and for the business?

Most companies do not change immigration firms just because a contract is expiring. Usually, there were real pain points:

• No clear picture of where you were taking more immigration risk than you wanted
• Slow or inconsistent responses to employees and recruiters
• Little visibility into what was happening in the pipeline or how long things should take, and the impact on hiring and project timelines

The transition is your chance to make “how we do immigration here” explicit.

Start with the situations that cause the most debate or confusion. For example:

• Promotions and title changes during the green card process
• Location changes and long‑term remote work
• Role changes after I‑140 approval
• Travel while the adjustment is pending
• How aggressive or conservative you want to be on wage levels and “edge” cases

Sit down with the firm you are moving to and walk through how they would handle three real examples from your program and how that would affect both risk and timelines. Capture the answers in language you would be comfortable repeating to a business leader or employee.

Then agree on a few basics that HR and mobility can actually run:

• Lead times for filings (for example, “we aim to file extensions at least X months before expiry,” “we aim to file PERMs within Y months of intake where the role qualifies”).
• Response times for employee questions and manager requests, with a clear definition of “urgent.”
• A short, concrete set of metrics you will look at each quarter, such as:
  
  • On‑time filing rate for extensions and green card steps
  • RFE rates on key categories
  • Average time from PERM initiation to filing
  • A quick pulse from employees and recruiters on how supported they feel
  • Any business indicators you care about (for example, start‑date delays tied to immigration)

Finally, give the relationship a simple structure:

• One named owner on your side and one at the firm, with clarity on how legal, HR, mobility, and procurement plug in.
• A regular check‑in (monthly at first, then quarterly) where you review a small set of real cases against the expectations you set, not just a slide deck.
• A clear escalation path for “this person’s status might be at risk” situations, so nobody is guessing who to call when it matters.

Real life is messy: budget cycles, leadership changes, and procurement timelines often force faster transitions than you would like. Even then, having a basic version of these three pieces—how you talk to people, what you move, and how decisions will be made can keep a necessary disruption from turning into a crisis.

If you can explain, in a few lines, how the new firm will handle risk, timelines, communication, and business impact differently from the last one, the transition is doing its job. If not, it is a signal to slow down just enough to get that clarity before you flip the switch

About the Author

Ashlee Drake Berry is an employment-based immigration attorney and Head of Legal at Casium, a legal technology company focused on U.S. business immigration. She previously managed high-volume H-1B, PERM, and green card programs for a major technology company and has extensive experience advising startups, enterprise employers, and individual professionals on temporary visas and employment-based green card strategies. Ashlee writes regularly about the intersection of immigration policy, legal technology, and talent strategy, with a focus on practical playbooks employers can use to navigate fast-changing rules.

‍