diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/ActivityFragment.kt b/app/src/main/java/umc/com/mobile/project/ui/career/ActivityFragment.kt
index 5a53720..50d5d1e 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/ActivityFragment.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/ActivityFragment.kt
@@ -6,6 +6,7 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
 import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.Observer
@@ -68,6 +69,13 @@ class ActivityFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        //뒤로가기 버튼 눌렀을 때
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                navigate(R.id.action_fragment_activity_to_fragment_career)
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)
         //대외 활동 api 연결
         viewModel.getActivityInfo()
     }
diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/CareerFragment.kt b/app/src/main/java/umc/com/mobile/project/ui/career/CareerFragment.kt
index b937b94..a7fe5e4 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/CareerFragment.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/CareerFragment.kt
@@ -5,6 +5,7 @@ import android.text.Editable
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import umc.com.mobile.project.R
diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/CertificateFragment.kt b/app/src/main/java/umc/com/mobile/project/ui/career/CertificateFragment.kt
index 8d815a8..f1331dc 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/CertificateFragment.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/CertificateFragment.kt
@@ -7,6 +7,7 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
 import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.Observer
@@ -60,7 +61,6 @@ class CertificateFragment : Fragment() {
                 false  // 그 외의 경우 이벤트 소비하지 않음
             }
         }
-
         _binding!!.ivCareerCertificateBack.setOnClickListener {
             navigate(R.id.action_fragment_certificate_to_fragment_career)
         }
@@ -69,6 +69,13 @@ class CertificateFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        //뒤로가기 버튼 눌렀을 때
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                navigate(R.id.action_fragment_certificate_to_fragment_career)
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)
         //자격증 목록 api 연결
         viewModel.getCertificateInfo()
     }
diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/ContestFragment.kt b/app/src/main/java/umc/com/mobile/project/ui/career/ContestFragment.kt
index 91a95d2..bf94711 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/ContestFragment.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/ContestFragment.kt
@@ -6,6 +6,7 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
 import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.Observer
@@ -53,6 +54,13 @@ class ContestFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        //뒤로가기 버튼 눌렀을 때
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                navigate(R.id.action_fragment_contest_to_fragment_career)
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)
         //공모전 목록 api 연결
         viewModel.getContestInfo()
         // adapter 초기화
diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/VolunteerFragment.kt b/app/src/main/java/umc/com/mobile/project/ui/career/VolunteerFragment.kt
index e79cc1f..78f027d 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/VolunteerFragment.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/VolunteerFragment.kt
@@ -6,6 +6,7 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
 import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.Observer
@@ -71,6 +72,13 @@ class VolunteerFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        //뒤로가기 버튼 눌렀을 때
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                navigate(R.id.action_fragment_volunteer_to_fragment_career)
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)
         //봉사 활동 목록 api 연결
         viewModel.getVolunteerInfo()
     }
diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditCertificateViewModel.kt b/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditCertificateViewModel.kt
index 20f51d0..4b6f3e4 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditCertificateViewModel.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditCertificateViewModel.kt
@@ -57,10 +57,6 @@ class CareerEditCertificateViewModel : ViewModel() {
         return !title.value.isNullOrBlank() || !type.value.isNullOrBlank() || !startDate.value.isNullOrBlank() || !endDate.value.isNullOrBlank()
     }
 
-    private fun isDateValid(date: String?): Boolean {
-        return date.isNullOrBlank() || date.length == 8
-    }
-
     fun updateCertificateType(selectedType: String) {
         type.value = selectedType
     }
diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditContestViewModel.kt b/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditContestViewModel.kt
index 8bd6c79..0083373 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditContestViewModel.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditContestViewModel.kt
@@ -57,10 +57,6 @@ class CareerEditContestViewModel : ViewModel() {
         return !title.value.isNullOrBlank() || !award.value.isNullOrBlank() || !startDate.value.isNullOrBlank() || !endDate.value.isNullOrBlank()
     }
 
-    private fun isDateValid(date: String?): Boolean {
-        return date.isNullOrBlank() || date.length == 8
-    }
-
     fun updateSelectedAward(selectedAward: String) {
         award.value = selectedAward
     }
diff --git a/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditVolunteerViewModel.kt b/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditVolunteerViewModel.kt
index 07fccca..cad2f85 100644
--- a/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditVolunteerViewModel.kt
+++ b/app/src/main/java/umc/com/mobile/project/ui/career/viewmodel/CareerEditVolunteerViewModel.kt
@@ -57,10 +57,6 @@ class CareerEditVolunteerViewModel : ViewModel() {
         return !title.value.isNullOrBlank() || !hour.value.isNullOrBlank() || !startDate.value.isNullOrBlank() || !endDate.value.isNullOrBlank()
     }
 
-    private fun isDateValid(date: String?): Boolean {
-        return date.isNullOrBlank() || date.length == 8
-    }
-
     private val careerApiService = ApiClient.createService<CareerApi>()
 
     private val _volunteerDetailInfo: MutableLiveData<CareerDetailResponse?> = MutableLiveData()