diff --git a/src/storm/shields/AbstractShield.cpp b/src/storm/shields/AbstractShield.cpp
index 309666aa9..2722b1916 100644
--- a/src/storm/shields/AbstractShield.cpp
+++ b/src/storm/shields/AbstractShield.cpp
@@ -1,6 +1,7 @@
 #include "storm/shields/AbstractShield.h"
 
 #include <boost/core/typeinfo.hpp>
+
 namespace tempest {
     namespace shields {
 
@@ -14,6 +15,15 @@ namespace tempest {
             // Intentionally left empty.
         }
 
+        template<typename ValueType, typename IndexType>
+        std::vector<IndexType> AbstractShield<ValueType, IndexType>::computeRowGroupSizes() {
+            std::vector<IndexType> rowGroupSizes(this->rowGroupIndices.size() - 1);
+            for(uint rowGroupStartIndex = 0; rowGroupStartIndex < rowGroupSizes.size(); rowGroupStartIndex++) {
+                rowGroupSizes.at(rowGroupStartIndex) = this->rowGroupIndices[rowGroupStartIndex + 1] - this->rowGroupIndices[rowGroupStartIndex];
+            }
+            return rowGroupSizes;
+        }
+
         template<typename ValueType, typename IndexType>
         std::string AbstractShield<ValueType, IndexType>::getClassName() const {
             return std::string(boost::core::demangled_name(BOOST_CORE_TYPEID(*this)));
diff --git a/src/storm/shields/AbstractShield.h b/src/storm/shields/AbstractShield.h
index 0ba34b56a..3dfcc2b1b 100644
--- a/src/storm/shields/AbstractShield.h
+++ b/src/storm/shields/AbstractShield.h
@@ -26,7 +26,8 @@ namespace tempest {
             /*!
              * TODO
              */
-            virtual storm::storage::Scheduler<ValueType> construct() = 0;
+            //virtual storm::storage::Scheduler<ValueType>* construct() = 0;
+            std::vector<IndexType> computeRowGroupSizes();
 
             /*!
              * TODO
diff --git a/src/storm/shields/PostSafetyShield.cpp b/src/storm/shields/PostSafetyShield.cpp
new file mode 100644
index 000000000..33b86a815
--- /dev/null
+++ b/src/storm/shields/PostSafetyShield.cpp
@@ -0,0 +1,57 @@
+#include "storm/shields/PostSafetyShield.h"
+
+#include <algorithm>
+
+namespace tempest {
+    namespace shields {
+
+        template<typename ValueType, typename IndexType>
+        PostSafetyShield<ValueType, IndexType>::PostSafetyShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) : AbstractShield<ValueType, IndexType>(rowGroupIndices, choiceValues, shieldingExpression, relevantStates, coalitionStates) {
+            // Intentionally left empty.
+        }
+
+        template<typename ValueType, typename IndexType>
+        storm::storage::PostScheduler<ValueType> PostSafetyShield<ValueType, IndexType>::construct() {
+            storm::storage::PostScheduler<ValueType> shield(this->rowGroupIndices.size() - 1, this->computeRowGroupSizes());
+            STORM_LOG_DEBUG(this->rowGroupIndices.size());
+            STORM_LOG_DEBUG(this->relevantStates);
+            STORM_LOG_DEBUG(this->coalitionStates.get());
+            for(auto const& x : this->choiceValues) {
+                STORM_LOG_DEBUG(x << ",");
+            }
+            auto choice_it = this->choiceValues.begin();
+            if(this->coalitionStates.is_initialized()) {
+                this->relevantStates &= this->coalitionStates.get();
+            }
+            STORM_LOG_DEBUG(this->relevantStates);
+            for(uint state = 0; state < this->rowGroupIndices.size() - 1; state++) {
+                if(this->relevantStates.get(state)) {
+                    uint rowGroupSize = this->rowGroupIndices[state + 1] - this->rowGroupIndices[state];
+                    auto maxProbabilityIndex = std::max_element(choice_it, choice_it + rowGroupSize) - choice_it;
+                    ValueType maxProbability = *(choice_it + maxProbabilityIndex);
+                    for(uint choice = 0; choice < rowGroupSize; choice++, choice_it++) {
+                        STORM_LOG_DEBUG("processing " << state << " with rowGroupSize of " << rowGroupSize << " choice index " << choice << " prob: " << *choice_it << " > " << maxProbability);
+                        storm::storage::Distribution<ValueType, IndexType> actionDistribution;
+                        if(allowedValue<ValueType, IndexType>(maxProbability, *choice_it, this->shieldingExpression)) {
+                            actionDistribution.addProbability(choice, 1);
+                        } else {
+                            actionDistribution.addProbability(maxProbabilityIndex, 1);
+                        }
+                        actionDistribution.normalize();
+                        STORM_LOG_DEBUG("  dist: " << actionDistribution);
+                        shield.setChoice(choice, storm::storage::SchedulerChoice<ValueType>(actionDistribution), state);
+                    }
+                } else {
+                    shield.setChoice(0, storm::storage::Distribution<ValueType, IndexType>(), state);
+                }
+            }
+            return shield;
+        }
+
+        // Explicitly instantiate appropriate
+        template class PostSafetyShield<double, typename storm::storage::SparseMatrix<double>::index_type>;
+#ifdef STORM_HAVE_CARL
+        template class PostSafetyShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>;
+#endif
+    }
+}
diff --git a/src/storm/shields/PostSafetyShield.h b/src/storm/shields/PostSafetyShield.h
new file mode 100644
index 000000000..7e077a940
--- /dev/null
+++ b/src/storm/shields/PostSafetyShield.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include "storm/shields/AbstractShield.h"
+#include "storm/storage/PostScheduler.h"
+
+namespace tempest {
+    namespace shields {
+
+        template<typename ValueType, typename IndexType>
+        class PostSafetyShield : public AbstractShield<ValueType, IndexType> {
+        public:
+            PostSafetyShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
+            storm::storage::PostScheduler<ValueType> construct();
+        };
+    }
+}
diff --git a/src/storm/shields/PreSafetyShield.cpp b/src/storm/shields/PreSafetyShield.cpp
index 98d32ded7..d1c769b2b 100644
--- a/src/storm/shields/PreSafetyShield.cpp
+++ b/src/storm/shields/PreSafetyShield.cpp
@@ -13,17 +13,15 @@ namespace tempest {
         template<typename ValueType, typename IndexType>
         storm::storage::Scheduler<ValueType> PreSafetyShield<ValueType, IndexType>::construct() {
             storm::storage::Scheduler<ValueType> shield(this->rowGroupIndices.size() - 1);
-            STORM_LOG_DEBUG(this->rowGroupIndices.size());
-            STORM_LOG_DEBUG(this->relevantStates);
-            for(auto const& x : this->choiceValues) {
-                STORM_LOG_DEBUG(x << ",");
-            }
             auto choice_it = this->choiceValues.begin();
+            if(this->coalitionStates.is_initialized()) {
+                this->relevantStates &= this->coalitionStates.get();
+            }
             for(uint state = 0; state < this->rowGroupIndices.size() - 1; state++) {
                 if(this->relevantStates.get(state)) {
                     uint rowGroupSize = this->rowGroupIndices[state + 1] - this->rowGroupIndices[state];
                     storm::storage::Distribution<ValueType, IndexType> actionDistribution;
-                    ValueType maxProbability = *std::max_element(this->choiceValues.begin(), this->choiceValues.begin() + rowGroupSize);
+                    ValueType maxProbability = *std::max_element(choice_it, choice_it + rowGroupSize);
                     for(uint choice = 0; choice < rowGroupSize; choice++, choice_it++) {
                         if(allowedValue<ValueType, IndexType>(maxProbability, *choice_it, this->shieldingExpression)) {
                             actionDistribution.addProbability(choice, *choice_it);