SimGym · Hands-on simulation lab

Practice on real problems before they’re real problems.

SimGym is where UnleashU engineers rehearse the work. Every simulation is a real-world scenario, assigned like a real ticket, built in a lab that’s safe to break, and reviewed by a peer on how the work gets done, not just whether it works.

SIM · VPN-MIG-01

Reviewed

Cisco ASA to Palo Alto Site-to-Site VPN Migration

Configure

Level 3 of 4

Assigned as a service ticket

Example peer review

Technical result

Excellent

Documentation

Excellent

Journaling

Acceptable

Expectations managed

Yes

Asset records updated

Yes

Rerun needed

No

Illustrative example of the review format. Individual results are never published.

SimGym by the numbers, since February 2024

227

simulations in the catalog

465

simulations assigned

464

peer reviews completed

96%

of reviewed work rated Acceptable or Excellent

Why a gym

Every engineer has a first time. It shouldn’t be on your network.

Employers want people with experience but rarely offer a safe place to get it. SimGym is that place. Our engineers make their first attempt at a migration, an upgrade or a recovery in a lab, with a reviewer behind them, long before they do it for a client.

Safe to break

Labs run on real vendor images and can be reset. Mistakes become lessons instead of outages.

Real conditions

Scenarios come from the work our clients need done, and each one arrives as a service ticket with a due date.

Reviewed by peers

A teammate scores both the result and the way it was delivered, then decides whether it needs another run.

What it gives our team

Confidence you can see, earned before it’s needed

First attempts happen in the lab

Engineers walk into a client engagement having already done the hard part once, with a reviewer in their corner.

Feedback on how, not just what

Scored feedback on documentation, communication and records gives every engineer a clear, specific next step.

A reviewed record of real skills

Each completed simulation adds to a history of what an engineer has actually done, not just what they’ve studied.

Knowledge that stays with the team

Every simulation keeps its guide and reference ticket, so what one engineer figures out becomes the next one’s starting point.

How it works

From assignment to review in five steps

01

Matched

A simulation is chosen from the catalog to fit the engineer’s learning journey and the technologies our clients run.

02

Assigned like real work

It arrives as a service ticket with a due date, in the same system we use for client requests.

03

Built in the lab

The engineer works in a virtual lab running real vendor images. Breaking things is allowed; labs reset.

04

Documented as it happens

Journal entries, status updates, asset records and clear expectations are part of the job, so they’re part of the simulation.

05

Peer-reviewed

A reviewer scores the technical outcome and the craft. Anything not right yet is flagged for a rerun.

Every review shapes the next assignment, so each engineer’s path through the catalog builds on what they’ve already shown they can do.

How we grade

We grade the craft, not just the config.

A working configuration is the minimum. Reviewers also score the habits that make engineers easy to work with: clear documentation, a running journal, honest expectations and up-to-date records.

Technical result rated Acceptable or Excellent

96%

441 scored reviews

Technical result rated Excellent

68%

441 scored reviews

Documentation rated Excellent

80%

440 scored reviews

Journaling rated Excellent

78%

284 scored reviews

Expectations managed with the requester

88%

462 scored reviews

Asset records updated

92%

449 scored reviews

Ticket status kept current

86%

118 scored reviews

54

Not right yet? Run it again.

Reviewers have flagged 54 simulations for a rerun, about one in eight reviews. A rerun isn’t a failure. It’s the reason a gym exists: the second attempt happens here too, not in front of a client.

The catalog

227 simulations, built from real work

Each simulation is a scenario we’ve met in the field, with a guide, a reference ticket and a lab. Most ask engineers to configure something; others ask them to build, manage, fix or discover. Four difficulty levels run from first deployments to fabric builds and firewall migrations.

Featured simulations

Configure · Level 3 of 4

Cisco ASA to Palo Alto Site-to-Site VPN Migration

Cisco ASA

Palo Alto

VPN

Migration

Configure · Level 3 of 4

Dual-ISP BGP Redundancy with Automatic Failover

Cisco IOS

Palo Alto

BGP

Build · Level 3 of 4

Cisco ASA to FTD/FMC Firewall Migration

Cisco ASA

Cisco FTD

Cisco FMC

Build · Level 4 of 4

Extreme VOSS Fabric Connect Build

Extreme

VOSS

Fabric

Configure · Level 4 of 4

Cisco ISE: Catalyst SGT Tagging Configuration

Cisco ISE

SGT

Segmentation

Build

Cisco ISE Upgrade from 2.4 to 3.3 (Staged Deployment)

Cisco ISE

Upgrade

Fix

Wireshark: Analyze the Do Not Fragment Bit in ICMP Traffic

Packet capture

Troubleshooting

Discover · Level 3 of 4

Decode Juniper QoS Policies

Juniper

Quality of Service

Build · Level 3 of 4

Build an AWS Network Environment with Terraform

AWS

Terraform

Infrastructure as code

Browse the full SimGym catalog →

From the gym to the job

Tested in SimGym. Delivered to a client.

Before one of our engineers built a tool that pulls firewall configurations through an API and turns them into a plain-language migration report, they proved the approach in SimGym on a different vendor’s firewall, with no risk to production.

Read the story: Your IT Team Doesn’t Need a Hero →

Firewall migration analysis

10 hrs → 2

from a manual review to an automated, plain-language report

Put SimGym to work

Three ways to get started

For hiring managers

Engineers with a reviewed record

Bring on engineers trained in our methodology, each with a SimGym history you can review before they start.

Talk to us about staffing

For engineers

Show us what you can do

Want to grow this way? See our open roles and how a simulation can be your first step with us.

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