diff --git a/def/taskUtils.go b/def/taskUtils.go
index 33f19f2..ba019e2 100644
--- a/def/taskUtils.go
+++ b/def/taskUtils.go
@@ -21,11 +21,13 @@ package def
 import (
 	"errors"
 	"fmt"
-	"log"
 	"sort"
 
 	"github.com/mash/gokmeans"
 	"github.com/montanaflynn/stats"
+     "github.com/spdfg/elektron/elektronLogging"
+	elekLogT "github.com/spdfg/elektron/elektronLogging/types"
+    log "github.com/sirupsen/logrus"
 )
 
 // Information about a cluster of tasks.
@@ -50,7 +52,8 @@ func (tc TasksToClassify) taskObservationCalculator(task Task) []float64 {
 	} else if task.Watts != 0.0 {
 		return []float64{task.Watts}
 	} else {
-		log.Fatal("Unable to classify tasks. Missing Watts or ClassToWatts attribute in workload.")
+        elektronLogging.ElektronLog.Log(elekLogT.ERROR, log.FatalLevel, 
+            log.Fields {}, "Unable to classify tasks. Missing Watts or ClassToWatts attribute in workload")
 		return []float64{0.0} // Won't reach here.
 	}
 }
@@ -105,7 +108,8 @@ func clusterSizeAvgMMMPU(tasks []Task, taskObservation func(task Task) []float64
 			} else {
 				// skip this value
 				// there is an error in the task config.
-				log.Println(err)
+				elektronLogging.ElektronLog.Log(elekLogT.ERROR, log.ErrorLevel, 
+                    log.Fields {}, fmt.Sprintf("%s",err))
 			}
 		} else {
 			// There is only one observation for the task.
diff --git a/utilities/offerUtils/offerUtils.go b/utilities/offerUtils/offerUtils.go
index 2d67af1..7f05411 100644
--- a/utilities/offerUtils/offerUtils.go
+++ b/utilities/offerUtils/offerUtils.go
@@ -19,11 +19,13 @@
 package offerUtils
 
 import (
-	"log"
 	"strings"
-
+    "fmt"
 	mesos "github.com/mesos/mesos-go/api/v0/mesosproto"
 	"github.com/spdfg/elektron/constants"
+    "github.com/spdfg/elektron/elektronLogging"
+	elekLogT "github.com/spdfg/elektron/elektronLogging/types"
+    log "github.com/sirupsen/logrus"
 )
 
 func OfferAgg(offer *mesos.Offer) (float64, float64, float64) {
@@ -88,12 +90,14 @@ func UpdateEnvironment(offer *mesos.Offer) {
 	var host = offer.GetHostname()
 	// If this host is not present in the set of hosts.
 	if _, ok := constants.Hosts[host]; !ok {
-		log.Printf("New host detected. Adding host [%s]", host)
+        elektronLogging.ElektronLog.Log(elekLogT.GENERAL, log.InfoLevel, 
+            log.Fields {"Adding host" : fmt.Sprintf("%s",host)}, "New host detected")
 		// Add this host.
 		constants.Hosts[host] = struct{}{}
 		// Get the power class of this host.
 		class := PowerClass(offer)
-		log.Printf("Registering the power class... Host [%s] --> PowerClass [%s]", host, class)
+        elektronLogging.ElektronLog.Log(elekLogT.GENERAL, log.InfoLevel, 
+            log.Fields {"host" : fmt.Sprintf("%s",host), "PowerClass" : fmt.Sprintf("%s", class)}, "Registering the power class...")
 		// If new power class, register the power class.
 		if _, ok := constants.PowerClasses[class]; !ok {
 			constants.PowerClasses[class] = make(map[string]struct{})
diff --git a/utilities/schedUtils/schedUtils.go b/utilities/schedUtils/schedUtils.go
index e25437e..31eff56 100644
--- a/utilities/schedUtils/schedUtils.go
+++ b/utilities/schedUtils/schedUtils.go
@@ -19,10 +19,12 @@
 package schedUtils
 
 import (
-	"log"
-
+    "fmt"
 	"github.com/spdfg/elektron/def"
 	"github.com/spdfg/elektron/utilities"
+    "github.com/spdfg/elektron/elektronLogging"
+	elekLogT "github.com/spdfg/elektron/elektronLogging/types"
+    log "github.com/sirupsen/logrus"
 )
 
 // Criteria for resizing the scheduling window.
@@ -77,8 +79,9 @@ func (s *fillNextOfferCycle) apply(taskQueue []def.Task) (int, int) {
 	for _, task := range taskQueue {
 		numberOfTasksTraversed++
 		for i := *task.Instances; i > 0; i-- {
-			log.Printf("Checking if Instance #%d of Task[%s] can be scheduled "+
-				"during the next offer cycle...", i, task.Name)
+            elektronLogging.ElektronLog.Log(elekLogT.GENERAL, log.InfoLevel, 
+            log.Fields {}, fmt.Sprintf("Checking if Instance #%d of Task[%s] can be scheduled "+
+				"during the next offer cycle...", i, task.Name))
 			if canSchedule(task) {
 				filledCPU += task.CPU
 				filledRAM += task.RAM