The PE Portfolio Staffing Playbook: Standardize the Tech Stack and Drive EBITDA in 90 Days

Thirty-five staffing M&A deals closed in Q1 2026. That is the strongest opening quarter in three years. If you are a PE operating partner or a portfolio ops leader, that pace is either your best year or your worst, and the difference comes down to how fast you standardize the tech stack.

Here is the number that should keep you up at night. Up to 60% of synergy targets in a staffing roll-up are IT-related. Back-office consolidation, shared front-office tools, killed duplicate licenses. When the tech drags, the synergies drag with it. And nothing drags like ERP and ATS sprawl.

Every add-on you buy shows up with its own applicant tracking system, its own payroll, its own reporting, and a pile of workarounds nobody documented. Stack three or four of those together and your synergy model turns into a wish list. The good news is this is a solved problem. It just requires sequence and discipline. Below is the 90-day playbook I run with portfolio teams.

Days 0 to 30: Decide the Target Stack and Freeze Everything Else

The biggest mistake I see is teams trying to migrate on week one. Do not. The first 30 days are about decisions, not moves.

Before or right at close, name the target stack. One ATS. One payroll and back-office system. One reporting layer. This is the platform company's stack in most cases, but not always. Sometimes the add-on has the better front-office tool. Pick on merit, then commit in writing so nobody relitigates it in month two.

Then freeze. No new software buys at the acquired firm. No renewals longer than a year. No new integrations. Every dollar spent on a tool you plan to kill is a dollar off your synergy number.

Use these 30 days to inventory what you actually bought:

• License audit. List every system, seat count, renewal date, and annual cost. Duplicate spend is the fastest EBITDA win you have.
• Data quality check. Pull a sample from the add-on's ATS. How clean is the candidate data? How many duplicate records? This tells you how hard the migration will be.
• Workflow map. How does a req move from open to fill at the acquired firm? You are going to change this, so document the starting point.

By day 30 you should have the target stack named, spend frozen, and a clear picture of the data you are about to move.

Days 31 to 60: Clean the Data and Consolidate the Back Office First

Back office before front office. Always. Payroll, invoicing, and financial reporting are where the fast, clean synergies live, and they touch fewer people day to day.

Consolidate the general ledger and payroll onto the target system. This is where you kill duplicate ERP licenses and stop paying two vendors to do one job. It also gives your CFO one source of truth for the portfolio, which matters when the lender asks for numbers.

While the back office moves, your data team cleans the front-office records. This is the unglamorous work that decides whether your ATS migration succeeds or turns into a six-month cleanup.

• De-duplicate candidate records. Two firms in the same market will have thousands of overlapping candidates. Merge them now, not after migration.
• Standardize job codes and status fields. If "placed" means three different things across three systems, your reporting is fiction.
• Map the fields. Every field in the old ATS needs a home in the new one, or a decision to drop it.

Do not skip the field mapping to save time. A rushed migration with bad mapping loses recruiter notes, submission history, and client relationships that took years to build. That is real revenue, not a data problem.

Days 61 to 90: Migrate the Front Office and Prove the Number

Now you move recruiters onto the standard ATS. You have clean data, a named target, and a mapped migration. This is the part everyone was afraid of, and it goes fine because you did the work in the first 60 days.

Migrate one team or one office at a time. Do not flip the whole add-on in a weekend. Move a pod, watch how they work for a week, fix what breaks, then move the next pod. Recruiters who lose their pipeline mid-week will quit or go around the system, and both cost you money.

Pair the migration with real adoption support. New system, new habits. If you drop the tool and walk away, usage craters and your synergy case falls apart on the ground even though it looked great on the slide. Getting the change to stick is its own discipline, and it is where most integrations quietly fail.

By day 90 you should have:

• One ATS across the platform and the add-on
• One back-office system with duplicate licenses canceled
• One reporting layer showing portfolio-wide numbers
• A tracked list of realized synergies with dollar amounts, not projections

That last point is what your investment committee wants. Not "integration on track." Realized dollars, named and dated.

Why Sequence Beats Speed

Every part of this playbook works because of order. Decide before you move. Back office before front office. Clean data before migration. One pod before the whole firm. Teams that try to do all of it at once are the teams still running four systems at month six, wondering where the synergies went.

The firms hitting their 90-day targets are not smarter. They just refused to move a single system until they named the target stack and froze new spend. That discipline is the whole game.

Do this week: Pull the license inventory for your most recent add-on. List every system, seat count, renewal date, and annual cost in one spreadsheet. Circle every renewal in the next 90 days. Those are your fastest EBITDA wins, and you can start canceling before you migrate a single record.