Picture a manufacturer with one IT manager handling password resets at 8am, a server alert at 10am, a phishing report at noon, and a vendor renewal at 2pm. The Microsoft 365 rollout, the firewall refresh, and the cybersecurity audit her insurer wants have been sitting at the bottom of her list for weeks. She is not failing; rather, she is a single individual managing the responsibilities typically handled by three people.
Co-managed IT closes that gap. An external partner works alongside your in-house IT person, taking on the workloads that are squeezing them while leaving the day-to-day relationship with your business in their hands.
What co-managed IT means
Co-managed IT is a shared support model. Your internal IT lead stays in place and remains in charge. An MSP plugs into your environment as a second team, handling the work your person does not have the time, tooling, or specialist expertise to cover alone.
In a typical split, in-house keeps end-user support, business knowledge, vendor relationships, and the day-to-day judgment calls. The MSP takes on infrastructure monitoring, patching, cybersecurity tooling, after-hours coverage, and specialist project work. You decide where the line sits, and that line moves as your needs change.
Your IT person ends the week with capacity left for the projects that move the business forward.
How co-managed IT differs from fully managed
The two models solve different problems. Here is how they compare:
Aspect | Fully managed IT | Co-managed IT |
In-house IT staff | None, or a non-technical owner | One or more internal IT staff |
Day-to-day support owner | The MSP | Your IT person, with MSP backup |
Business knowledge | Held mostly by the MSP | Stays with your internal lead |
Best fit | Businesses without IT staff, usually 10–100 users | Businesses with 100+ users and at least one IT hire |
Control | Outsourced | Shared, with you setting the boundaries |
If you do not have an internal IT person, fully managed is the right starting point. If you do, co-managed protects the relationship you already have while filling the gaps around it.
Where growing SMBs hit the ceiling with in-house IT only
In our experience working with SMBs across Southwestern Ontario, a single IT hire can carry a business of around thirty people comfortably. Once a company passes 75 to 100 users, the workload starts outgrowing what one person can absorb. The four pressures we see most often:
After-hours and weekend coverage
Servers, backups, and security alerts do not stop at 5pm. If your IT person is the only one watching, they are either on call constantly or you have blind spots overnight.
Cybersecurity expertise
The Canadian Centre for Cyber Security expects ransomware to remain a significant threat to Canadian organizations through 2027, with attacks getting cheaper and faster to launch thanks to AI. Defending against that takes managed detection and response, a real patching cadence, and someone available to handle an incident at 2am. That is hard for a single person to own. The 2025 ISC2 Cybersecurity Workforce Study found that 95% of cybersecurity teams report at least one skills gap, and 88% experienced a significant security event tied to those gaps. That is the industry as a whole, with dedicated teams. A one-person IT department feels it harder.
Cloud and identity work
Microsoft 365 has moved from a mailbox to the centre of how businesses operate. Rolling out Copilot or tightening conditional access for a tenant that is going to host AI features is specialist work that benefits from a second set of hands.
Project work that keeps slipping
Hardware refreshes, audits, mergers and acquisitions, and compliance projects all need a chunk of focused time. When the same person is handling tickets, projects get pushed quarter after quarter.
What co-managed IT looks like in practice
A good co-managed setup feels like one team that happens to sit in two places. A few things are non-negotiable:
- Shared ticketing so your IT person can see what we are working on, and we can see what they are working on
- Documented escalation paths so when a server alert fires at 11pm, no one is guessing who picks it up
- Joint roadmap conversations once a quarter, focused on where the business is going and what the IT environment needs to look like to get there
Signs your business is ready for a co-managed model
The clearest signals we see:
- Your internal IT person regularly works late or weekends
- Cybersecurity items keep slipping down the priority list
- Strategic projects are six months or more behind
- You are considering a second IT hire, but the workload is uneven and you cannot quite justify a full-time role
That last one is often the tipping point. Hiring a second IT person is a fixed commitment in salary, benefits, and management time. Co-managed gives you the same hands on deck without the long-term overhead, and the workload flexes as your needs change.
How Attache Group works as a co-managed partner in Windsor
We have been running co-managed engagements with businesses across Southwestern Ontario for over thirty years, with teams in Windsor and London, Ontario who know the local market. Every relationship starts the same way: we get to know your IT person, agree clearly on who owns what, set up the shared tooling, then take on the workloads causing the most pressure right now. Usually that is security, after-hours coverage, or a project that has been waiting too long for attention.
If you want to see what this would look like for your business, our complimentary IT assessment walks through your current setup, identifies the gaps, and shows where co-managed could take the pressure off with no obligation to go further.
