diff --git a/backend/internal/handler/admin/ops_handler.go b/backend/internal/handler/admin/ops_handler.go
index 822f7d62..44accc8f 100644
--- a/backend/internal/handler/admin/ops_handler.go
+++ b/backend/internal/handler/admin/ops_handler.go
@@ -111,6 +111,7 @@ func (h *OpsHandler) GetErrorLogs(c *gin.Context) {
 	filter.Owner = strings.TrimSpace(c.Query("error_owner"))
 	filter.Source = strings.TrimSpace(c.Query("error_source"))
 	filter.Query = strings.TrimSpace(c.Query("q"))
+	filter.UserQuery = strings.TrimSpace(c.Query("user_query"))
 
 	// Force request errors: client-visible status >= 400.
 	// buildOpsErrorLogsWhere already applies this for non-upstream phase.
@@ -211,6 +212,7 @@ func (h *OpsHandler) ListRequestErrors(c *gin.Context) {
 	filter.Owner = strings.TrimSpace(c.Query("error_owner"))
 	filter.Source = strings.TrimSpace(c.Query("error_source"))
 	filter.Query = strings.TrimSpace(c.Query("q"))
+	filter.UserQuery = strings.TrimSpace(c.Query("user_query"))
 
 	// Force request errors: client-visible status >= 400.
 	// buildOpsErrorLogsWhere already applies this for non-upstream phase.
diff --git a/backend/internal/repository/ops_repo.go b/backend/internal/repository/ops_repo.go
index d889269f..613c5bd5 100644
--- a/backend/internal/repository/ops_repo.go
+++ b/backend/internal/repository/ops_repo.go
@@ -326,6 +326,7 @@ SELECT
   COALESCE(e.upstream_errors::text, ''),
   e.is_business_limited,
   e.user_id,
+  COALESCE(u.email, ''),
   e.api_key_id,
   e.account_id,
   COALESCE(a.name, ''),
@@ -345,6 +346,7 @@ SELECT
   e.request_body_bytes,
   COALESCE(e.request_headers::text, '')
 FROM ops_error_logs e
+LEFT JOIN users u ON e.user_id = u.id
 LEFT JOIN accounts a ON e.account_id = a.id
 LEFT JOIN groups g ON e.group_id = g.id
 WHERE e.id = $1
@@ -395,6 +397,7 @@ LIMIT 1`
 		&out.UpstreamErrors,
 		&out.IsBusinessLimited,
 		&userID,
+		&out.UserEmail,
 		&apiKeyID,
 		&accountID,
 		&out.AccountName,
@@ -1033,6 +1036,13 @@ func buildOpsErrorLogsWhere(filter *service.OpsErrorLogFilter) (string, []any) {
 		clauses = append(clauses, "(request_id ILIKE $"+n+" OR client_request_id ILIKE $"+n+" OR error_message ILIKE $"+n+")")
 	}
 
+	if userQuery := strings.TrimSpace(filter.UserQuery); userQuery != "" {
+		like := "%" + userQuery + "%"
+		args = append(args, like)
+		n := itoa(len(args))
+		clauses = append(clauses, "u.email ILIKE $"+n)
+	}
+
 	return "WHERE " + strings.Join(clauses, " AND "), args
 }
 
diff --git a/backend/internal/service/ops_models.go b/backend/internal/service/ops_models.go
index c7666e92..347cd52b 100644
--- a/backend/internal/service/ops_models.go
+++ b/backend/internal/service/ops_models.go
@@ -93,6 +93,7 @@ type OpsErrorLogFilter struct {
 	Source           string
 	Resolved         *bool
 	Query            string
+	UserQuery        string // Search by user email
 
 	// Optional correlation keys for exact matching.
 	RequestID       string