diff --git a/app/Console/Commands/Roster/CheckForNewS1ExamPasses.php b/app/Console/Commands/Roster/CheckForNewS1ExamPasses.php
new file mode 100644
index 0000000000..fa0b5c4100
--- /dev/null
+++ b/app/Console/Commands/Roster/CheckForNewS1ExamPasses.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Console\Commands\Roster;
+
+use App\Models\Cts\Member;
+use App\Models\Mship\Account;
+use App\Models\Mship\State;
+use App\Models\Roster;
+use App\Repositories\Cts\ExamResultRepository;
+use Illuminate\Console\Command;
+
+class CheckForNewS1ExamPasses extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'roster:check-new-s1-exams';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Make a query to CTS for new exam passes and add them to the roster if applicable.';
+
+    /**
+     * Execute the console command.
+     */
+    public function handle(ExamResultRepository $repository)
+    {
+        $recentSuccessfulS1Exams = $repository->getRecentPassedExamsOfType('OBS');
+
+        foreach ($recentSuccessfulS1Exams as $exam) {
+            $ctsMember = Member::where('id', $exam->student_id)->first();
+            $coreAccount = Account::find($ctsMember->cid);
+
+            if (! $coreAccount) {
+                $this->error("Could not find account for student ID {$exam->student_id}.");
+
+                continue;
+            }
+
+            if (! $coreAccount->hasState(State::findByCode('DIVISION'))) {
+                $this->error("Account {$coreAccount->id} does not have the DIVISION state.");
+
+                continue;
+            }
+
+            Roster::upsert(['account_id' => $coreAccount->id], uniqueBy: ['account_id']);
+
+            $this->info("Added account {$coreAccount->id} to the roster.");
+        }
+    }
+}
diff --git a/app/Console/Kernel.php b/app/Console/Kernel.php
index 6f8bc06be5..8ad925874c 100644
--- a/app/Console/Kernel.php
+++ b/app/Console/Kernel.php
@@ -62,6 +62,10 @@ protected function schedule(Schedule $schedule)
             ->hourlyAt(25)
             ->graceTimeInMinutes(5);
 
+        $schedule->command('roster:check-new-s1-exams')
+            ->hourlyAt(30)
+            ->graceTimeInMinutes(5);
+
         // === By Day === //
 
         $schedule->command('telescope:prune')
diff --git a/app/Models/Cts/PracticalResult.php b/app/Models/Cts/PracticalResult.php
new file mode 100644
index 0000000000..1b1e90d418
--- /dev/null
+++ b/app/Models/Cts/PracticalResult.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Models\Cts;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class PracticalResult extends Model
+{
+    use HasFactory;
+
+    protected $connection = 'cts';
+
+    public $timestamps = false;
+
+    public const PASSED = 'P';
+
+    public const FAILED = 'F';
+
+    protected $casts = [
+        'date' => 'datetime',
+    ];
+}
diff --git a/app/Repositories/Cts/ExamResultRepository.php b/app/Repositories/Cts/ExamResultRepository.php
new file mode 100644
index 0000000000..905d8ab7bc
--- /dev/null
+++ b/app/Repositories/Cts/ExamResultRepository.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Repositories\Cts;
+
+use App\Models\Cts\PracticalResult;
+use Illuminate\Support\Collection;
+
+class ExamResultRepository
+{
+    public function getRecentPassedExamsOfType(string $type, int $daysConsideredRecent = 3): Collection
+    {
+        return PracticalResult::where('result', PracticalResult::PASSED)
+            ->where('exam', $type)
+            ->where('date', '>=', now()->subDays($daysConsideredRecent))
+            ->get();
+    }
+}
diff --git a/database/factories/Cts/PracticalResultFactory.php b/database/factories/Cts/PracticalResultFactory.php
new file mode 100644
index 0000000000..3430ce8f71
--- /dev/null
+++ b/database/factories/Cts/PracticalResultFactory.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace Database\Factories\Cts;
+
+use App\Models\Cts\Member;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\Cts\PracticalResult>
+ */
+class PracticalResultFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        return [
+            'examid' => $this->faker->randomNumber(3),
+            'student_id' => factory(Member::class)->create()->id,
+            'exam' => $this->faker->randomElement(['OBS', 'TWR', 'APP', 'CTR']),
+            'result' => $this->faker->randomElement(['P', 'F']),
+            'date' => $this->faker->dateTime(),
+        ];
+    }
+}
diff --git a/tests/Database/MockCtsDatabase.php b/tests/Database/MockCtsDatabase.php
index e331822c68..1d148a55a2 100644
--- a/tests/Database/MockCtsDatabase.php
+++ b/tests/Database/MockCtsDatabase.php
@@ -217,6 +217,23 @@ public static function create()
                 KEY `student_id` (`student_id`)
               );"
         );
+
+        DB::connection('cts')->statement(
+            "CREATE TABLE `practical_results` (
+                `id` smallint unsigned NOT NULL AUTO_INCREMENT,
+                `examid` smallint unsigned NOT NULL DEFAULT '0',
+                `student_id` int unsigned NOT NULL DEFAULT '0',
+                `exam` enum('P1','P2','P3','P4','P5','P6','P7','P8','P9','OBS','TWR','APP','CTR','S3','C1','C3') NOT NULL DEFAULT 'TWR',
+                `notes` longtext,
+                `result` char(1) NOT NULL DEFAULT '',
+                `date` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
+                `cert_upgrade` tinyint unsigned DEFAULT '0',
+                `upgrade_by` int unsigned DEFAULT '0',
+                `upgrade_date` datetime DEFAULT NULL,
+                PRIMARY KEY (`id`),
+                KEY `student_id` (`student_id`)
+              );"
+        );
     }
 
     public static function destroy()
@@ -260,5 +277,9 @@ public static function destroy()
         DB::connection('cts')->statement(
             'DROP TABLE IF EXISTS `theory_results`;'
         );
+
+        DB::connection('cts')->statement(
+            'DROP TABLE IF EXISTS `practical_results`;'
+        );
     }
 }
diff --git a/tests/Unit/CTS/ExamResultsRepositoryTest.php b/tests/Unit/CTS/ExamResultsRepositoryTest.php
new file mode 100644
index 0000000000..9df1887b86
--- /dev/null
+++ b/tests/Unit/CTS/ExamResultsRepositoryTest.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace Tests\Unit\CTS;
+
+use App\Models\Cts\Member;
+use App\Models\Cts\PracticalResult;
+use App\Models\Mship\Account;
+use App\Repositories\Cts\ExamResultRepository;
+use Tests\TestCase;
+
+class ExamResultsRepositoryTest extends TestCase
+{
+    public function test_retrieves_passed_exam_results_of_type()
+    {
+        $account = Account::factory()->create(['id' => 1111111]);
+        $member = factory(Member::class)->create([
+            'cid' => $account->id,
+        ]);
+
+        $examResult = PracticalResult::factory()->create([
+            'result' => PracticalResult::PASSED,
+            'student_id' => $member->id,
+            'exam' => 'OBS',
+            'date' => now()->subDays(1),
+        ]);
+
+        // ensure failed result isn't returned
+        $notSuccessfulPracticalResult = PracticalResult::factory()->create([
+            'result' => PracticalResult::FAILED,
+            'student_id' => $member->id,
+            'exam' => 'OBS',
+        ]);
+
+        $repository = new ExamResultRepository();
+        $result = $repository->getRecentPassedExamsOfType('OBS');
+
+        $this->assertNotNull($result->where('id', $examResult->id)->first());
+        $this->assertNull($result->where('id', $notSuccessfulPracticalResult->id)->first());
+    }
+
+    public function test_doesnt_return_non_recent_exam_passes()
+    {
+        $account = Account::factory()->create(['id' => 1111111]);
+        $member = factory(Member::class)->create([
+            'cid' => $account->id,
+        ]);
+
+        $examResult = PracticalResult::factory()->create([
+            'result' => PracticalResult::PASSED,
+            'student_id' => $member->id,
+            'exam' => 'OBS',
+            'date' => now()->subDays(4),
+        ]);
+
+        $repository = new ExamResultRepository();
+        $result = $repository->getRecentPassedExamsOfType('OBS');
+
+        $this->assertNull($result->where('id', $examResult->id)->first());
+    }
+
+    public function test_only_returns_recent_successful_exams_of_specified_type()
+    {
+        $account = Account::factory()->create(['id' => 1111111]);
+        $member = factory(Member::class)->create([
+            'cid' => $account->id,
+        ]);
+
+        $examResult = PracticalResult::factory()->create([
+            'result' => PracticalResult::PASSED,
+            'student_id' => $member->id,
+            'exam' => 'TWR',
+            'date' => now()->subDays(1),
+        ]);
+
+        $notSuccessfulPracticalResult = PracticalResult::factory()->create([
+            'result' => PracticalResult::FAILED,
+            'student_id' => $member->id,
+            'exam' => 'OBS',
+            'date' => now()->subDays(1),
+        ]);
+
+        $repository = new ExamResultRepository();
+        $result = $repository->getRecentPassedExamsOfType('OBS');
+
+        $this->assertNull($result->where('id', $examResult->id)->first());
+        $this->assertNull($result->where('id', $notSuccessfulPracticalResult->id)->first());
+    }
+}
diff --git a/tests/Unit/Command/AddNewS1ToRosterCommandTest.php b/tests/Unit/Command/AddNewS1ToRosterCommandTest.php
new file mode 100644
index 0000000000..b87c7627ce
--- /dev/null
+++ b/tests/Unit/Command/AddNewS1ToRosterCommandTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Tests\Unit\Command;
+
+use App\Models\Cts\Member;
+use App\Models\Cts\PracticalResult;
+use App\Models\Mship\Account;
+use App\Models\Mship\State;
+use App\Models\Roster;
+use Illuminate\Support\Facades\Artisan;
+use Tests\TestCase;
+
+class AddNewS1ToRosterCommandTest extends TestCase
+{
+    public function test_detects_recent_s1_exams_and_adds_when_not_on_roster_home_member()
+    {
+        $account = Account::factory()->create(['id' => 1111111]);
+        $account->addState(State::findByCode('DIVISION'));
+
+        $ctsMember = factory(Member::class)->create(['cid' => $account->id]);
+        PracticalResult::factory()->create(['student_id' => $ctsMember->id, 'result' => PracticalResult::PASSED, 'exam' => 'OBS', 'date' => now()->subDays(1)]);
+
+        Artisan::call('roster:check-new-s1-exams');
+
+        $this->assertDatabaseHas('roster', [
+            'account_id' => $account->id,
+        ]);
+    }
+
+    public function test_maintains_roster_when_already_on_roster()
+    {
+        $account = Account::factory()->create(['id' => 1111111]);
+        $account->addState(State::findByCode('DIVISION'));
+
+        $ctsMember = factory(Member::class)->create(['cid' => $account->id]);
+        PracticalResult::factory()->create(['student_id' => $ctsMember->id, 'result' => PracticalResult::PASSED, 'exam' => 'OBS', 'date' => now()->subDays(1)]);
+
+        Roster::create(['account_id' => $account->id]);
+
+        Artisan::call('roster:check-new-s1-exams');
+
+        $this->assertDatabaseHas('roster', [
+            'account_id' => $account->id,
+        ]);
+    }
+
+    public function test_does_not_add_when_not_on_roster_and_missing_division_state()
+    {
+        $account = Account::factory()->create(['id' => 1111111]);
+        $account->addState(State::findByCode('VISITING'));
+
+        $ctsMember = factory(Member::class)->create(['cid' => $account->id]);
+        PracticalResult::factory()->create(['student_id' => $ctsMember->id, 'result' => PracticalResult::PASSED, 'exam' => 'OBS', 'date' => now()->subDays(1)]);
+
+        Artisan::call('roster:check-new-s1-exams');
+
+        $this->assertDatabaseMissing('roster', [
+            'account_id' => $account->id,
+        ]);
+    }
+}
diff --git a/tests/Unit/Roster/AccountCanControlTest.php b/tests/Unit/Roster/AccountCanControlTest.php
index 50adecd339..bc1a7612b6 100644
--- a/tests/Unit/Roster/AccountCanControlTest.php
+++ b/tests/Unit/Roster/AccountCanControlTest.php
@@ -9,10 +9,17 @@
 use App\Models\Mship\Qualification;
 use App\Models\Mship\State;
 use App\Models\Roster;
+use Illuminate\Support\Facades\Event;
 use Tests\TestCase;
 
 class AccountCanControlTest extends TestCase
 {
+    public function setUp(): void
+    {
+        parent::setUp();
+        Event::fake();
+    }
+
     public function test_detects_can_control_with_rating_when_home_member()
     {
         $qualification = Qualification::code('S2')->first();