diff --git a/src/main/java/com/wooribound/domain/jobposting/JobPostingRepository.java b/src/main/java/com/wooribound/domain/jobposting/JobPostingRepository.java
index 9870bb8..faafdc9 100644
--- a/src/main/java/com/wooribound/domain/jobposting/JobPostingRepository.java
+++ b/src/main/java/com/wooribound/domain/jobposting/JobPostingRepository.java
@@ -70,7 +70,7 @@ List<JobPostingProjection> findJobPostingsNew(@Param("exJobs") List<String> exJo
                                                   @Param("interestJobs") List<String> interestJobs);
 
     // 2. 공고 상세 조회
-    JobPosting findJobPostingByPostId(@Param("postId") Long postId);
+    Optional<JobPosting> findJobPostingByPostId(@Param("postId") Long postId);
 
     // 3. 내 기업 공고 목록 조회
     // JOBPOSTING + COUNT(쿼리연산) 반환해야해서 프로젝션 인터페이스로 리턴값 설정 JobPostingDetailProjection
diff --git a/src/main/java/com/wooribound/domain/jobposting/Service/AdminJobPostingServiceImpl.java b/src/main/java/com/wooribound/domain/jobposting/Service/AdminJobPostingServiceImpl.java
index 1f3ae6f..0683db0 100644
--- a/src/main/java/com/wooribound/domain/jobposting/Service/AdminJobPostingServiceImpl.java
+++ b/src/main/java/com/wooribound/domain/jobposting/Service/AdminJobPostingServiceImpl.java
@@ -18,6 +18,7 @@
 
 import java.util.Date;
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.Collectors;
 
 @RequiredArgsConstructor
@@ -37,30 +38,28 @@ public List<JobPostingDTO> getAllJobPostings(AdminJobPostingReqDTO adminJobPosti
 
     @Override
     public JobPostingDetailDTO getJobPostingDetail(Long postId) {
-        try {
-            JobPosting jobPosting = jobPostingRepository.findJobPostingByPostId(postId);
+        Optional<JobPosting> optionalJobPosting = jobPostingRepository.findJobPostingByPostId(postId);
 
-            if (jobPosting == null) {
-                throw new NoJobPostingException("해당 공고 ID를 찾을 수 없습니다: " + postId);
-            }
-
-            return JobPostingDetailDTO.builder()
-                    .postTitle(jobPosting.getPostTitle())
-                    .entName(jobPosting.getEnterprise().getEntName())
-                    .postImg(jobPosting.getPostImg())
-                    .startDate(jobPosting.getStartDate())
-                    .endDate(jobPosting.getEndDate())
-                    .jobName(jobPosting.getJob().getJobName())
-                    .entAddr1(jobPosting.getEnterprise().getEntAddr1())
-                    .build();
-        } catch (Exception e) {
-            throw new NoJobPostingException("채용공고 정보를 가져오는 도중 에러가 발생했습니다: " + postId, e);
+        if (optionalJobPosting.isEmpty()) {
+            throw new NoJobPostingException("해당 공고 ID를 찾을 수 없습니다: " + postId);
         }
+
+        JobPosting jobPosting = optionalJobPosting.get();
+
+        return JobPostingDetailDTO.builder()
+                .postTitle(jobPosting.getPostTitle())
+                .entName(jobPosting.getEnterprise().getEntName())
+                .postImg(jobPosting.getPostImg())
+                .startDate(jobPosting.getStartDate())
+                .endDate(jobPosting.getEndDate())
+                .jobName(jobPosting.getJob().getJobName())
+                .entAddr1(jobPosting.getEnterprise().getEntAddr1())
+                .build();
     }
 
     @Override
     public String deleteJobPosting(Long postId) {
-        JobPosting jobPosting = jobPostingRepository.findJobPostingByPostId(postId);
+        Optional <JobPosting> optionalJobPosting = jobPostingRepository.findJobPostingByPostId(postId);
 
         if (jobPostingRepository.updateIsDeletedByPostId(postId) != 0) {
             try {
@@ -70,6 +69,8 @@ public String deleteJobPosting(Long postId) {
                     throw new NoUserApplyException(postId);  // 지원자가 없을 경우 예외 던짐
                 }
 
+                JobPosting jobPosting = optionalJobPosting.get();
+
                 for (UserApply userApply : userApplies) {
                     Notification notification = Notification.builder()
                             .wbUser(userApply.getWbUser())
diff --git a/src/main/java/com/wooribound/domain/resume/ResumeServiceImpl.java b/src/main/java/com/wooribound/domain/resume/ResumeServiceImpl.java
index 4693615..b017d83 100644
--- a/src/main/java/com/wooribound/domain/resume/ResumeServiceImpl.java
+++ b/src/main/java/com/wooribound/domain/resume/ResumeServiceImpl.java
@@ -148,7 +148,6 @@ public ResumeDTO updateResume(Authentication authentication, MultipartFile userI
 
     @Override
     public ResumeDetailDTO getWbUserResume(String userId) {
-        try {
             WbUser byIdWbUser = wbUserRepository.findById(userId)
                     .orElseThrow(() -> new NoWbUserException("해당 사용자 ID를 찾을 수 없습니다: " + userId));
 
@@ -170,9 +169,6 @@ public ResumeDetailDTO getWbUserResume(String userId) {
                     .resumeEmail(resume.getResumeEmail())
                     .jobList(jobs)
                     .build();
-        } catch (NoWbUserException e) {
-            throw e;
-        }
     }
 
     private String createFileName(String fileName){