diff --git a/beacon-chain/BUILD.bazel b/beacon-chain/BUILD.bazel
index 5c84e06e2ed7..9347910afbd2 100644
--- a/beacon-chain/BUILD.bazel
+++ b/beacon-chain/BUILD.bazel
@@ -59,6 +59,7 @@ go_image(
         "//shared/featureconfig:go_default_library",
         "//shared/logutil:go_default_library",
         "//shared/version:go_default_library",
+        "//shared/params:go_default_library",
         "@com_github_ethereum_go_ethereum//log:go_default_library",
         "@com_github_ipfs_go_log//:go_default_library",
         "@com_github_joonix_log//:go_default_library",
@@ -68,6 +69,7 @@ go_image(
         "@in_gopkg_urfave_cli_v2//:go_default_library",
         "@in_gopkg_urfave_cli_v2//altsrc:go_default_library",
         "@org_uber_go_automaxprocs//:go_default_library",
+        "@in_gopkg_yaml_v2//:go_default_library",
     ],
 )
 
diff --git a/beacon-chain/main.go b/beacon-chain/main.go
index bf4cde9efd71..fdcee2dfc9d2 100644
--- a/beacon-chain/main.go
+++ b/beacon-chain/main.go
@@ -87,6 +87,7 @@ var appFlags = []cli.Flag{
 	cmd.LogFileName,
 	cmd.EnableUPnPFlag,
 	cmd.ConfigFileFlag,
+	cmd.ChainConfigFileFlag,
 }
 
 func init() {
diff --git a/beacon-chain/node/node.go b/beacon-chain/node/node.go
index acfa3a42f9ce..d603039f312e 100644
--- a/beacon-chain/node/node.go
+++ b/beacon-chain/node/node.go
@@ -93,6 +93,11 @@ func NewBeaconNode(cliCtx *cli.Context) (*BeaconNode, error) {
 		return nil, err
 	}
 
+	if cliCtx.IsSet(cmd.ChainConfigFileFlag.Name) {
+		chainConfigFileName := cliCtx.String(cmd.ChainConfigFileFlag.Name)
+		params.LoadChainConfigFile(chainConfigFileName)
+	}
+
 	featureconfig.ConfigureBeaconChain(cliCtx)
 	flags.ConfigureGlobalFlags(cliCtx)
 	registry := shared.NewServiceRegistry()
diff --git a/beacon-chain/rpc/beacon/attestations_test.go b/beacon-chain/rpc/beacon/attestations_test.go
index d8db832bc2d4..149dbe5466a0 100644
--- a/beacon-chain/rpc/beacon/attestations_test.go
+++ b/beacon-chain/rpc/beacon/attestations_test.go
@@ -13,7 +13,6 @@ import (
 	"github.com/gogo/protobuf/proto"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/golang/mock/gomock"
-	"github.com/prysmaticlabs/prysm/beacon-chain/state/stateutil"
 	ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
 	"github.com/prysmaticlabs/go-bitfield"
 	mock "github.com/prysmaticlabs/prysm/beacon-chain/blockchain/testing"
@@ -27,6 +26,7 @@ import (
 	mockRPC "github.com/prysmaticlabs/prysm/beacon-chain/rpc/testing"
 	stateTrie "github.com/prysmaticlabs/prysm/beacon-chain/state"
 	"github.com/prysmaticlabs/prysm/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/beacon-chain/state/stateutil"
 	pbp2p "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
 	"github.com/prysmaticlabs/prysm/shared/attestationutil"
 	"github.com/prysmaticlabs/prysm/shared/bytesutil"
diff --git a/beacon-chain/rpc/validator/proposer_test.go b/beacon-chain/rpc/validator/proposer_test.go
index 72dd8c6c7629..5357fbd0336f 100644
--- a/beacon-chain/rpc/validator/proposer_test.go
+++ b/beacon-chain/rpc/validator/proposer_test.go
@@ -23,6 +23,7 @@ import (
 	mockPOW "github.com/prysmaticlabs/prysm/beacon-chain/powchain/testing"
 	beaconstate "github.com/prysmaticlabs/prysm/beacon-chain/state"
 	"github.com/prysmaticlabs/prysm/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/beacon-chain/state/stateutil"
 	mockSync "github.com/prysmaticlabs/prysm/beacon-chain/sync/initial-sync/testing"
 	dbpb "github.com/prysmaticlabs/prysm/proto/beacon/db"
 	pbp2p "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
@@ -33,7 +34,6 @@ import (
 	"github.com/prysmaticlabs/prysm/shared/params"
 	"github.com/prysmaticlabs/prysm/shared/testutil"
 	"github.com/prysmaticlabs/prysm/shared/trieutil"
-	"github.com/prysmaticlabs/prysm/beacon-chain/state/stateutil"
 )
 
 func TestGetBlock_OK(t *testing.T) {
diff --git a/beacon-chain/usage.go b/beacon-chain/usage.go
index 33473af8b22a..cb9f7744dacf 100644
--- a/beacon-chain/usage.go
+++ b/beacon-chain/usage.go
@@ -61,6 +61,7 @@ var appHelpFlagGroups = []flagGroup{
 			cmd.ForceClearDB,
 			cmd.ClearDB,
 			cmd.ConfigFileFlag,
+			cmd.ChainConfigFileFlag,
 		},
 	},
 	{
diff --git a/fuzz/block_fuzz.go b/fuzz/block_fuzz.go
index 89f1cace4dab..09c9b2a2aae0 100644
--- a/fuzz/block_fuzz.go
+++ b/fuzz/block_fuzz.go
@@ -1,4 +1,3 @@
-
 package fuzz
 
 import (
@@ -33,4 +32,3 @@ func BeaconFuzzBlock(b []byte) ([]byte, bool) {
 	}
 	return success(post)
 }
-
diff --git a/fuzz/block_header_fuzz.go b/fuzz/block_header_fuzz.go
index fd418ee3334f..58cc1a6736b0 100644
--- a/fuzz/block_header_fuzz.go
+++ b/fuzz/block_header_fuzz.go
@@ -1,11 +1,11 @@
 package fuzz
 
 import (
+	"github.com/prysmaticlabs/go-ssz"
 	"github.com/prysmaticlabs/prysm/beacon-chain/core/blocks"
 	stateTrie "github.com/prysmaticlabs/prysm/beacon-chain/state"
 	prylabs_testing "github.com/prysmaticlabs/prysm/fuzz/testing"
 	"github.com/prysmaticlabs/prysm/shared/params"
-	"github.com/prysmaticlabs/go-ssz"
 )
 
 // BeaconFuzzBlockHeader using the corpora from sigp/beacon-fuzz.
diff --git a/fuzz/common.go b/fuzz/common.go
index a678428d043b..1f34cbe66d54 100644
--- a/fuzz/common.go
+++ b/fuzz/common.go
@@ -38,4 +38,4 @@ func success(post *stateTrie.BeaconState) ([]byte, bool) {
 		panic(err)
 	}
 	return result, true
-}
\ No newline at end of file
+}
diff --git a/shared/cmd/flags.go b/shared/cmd/flags.go
index eb03b5caf4ed..19bfd2f732d3 100644
--- a/shared/cmd/flags.go
+++ b/shared/cmd/flags.go
@@ -174,4 +174,9 @@ var (
 		Name:  "config-file",
 		Usage: "The filepath to a yaml file with flag values",
 	}
+	// ChainConfigFileFlag specifies the filepath to load flag values.
+	ChainConfigFileFlag = &cli.StringFlag{
+		Name:  "chain-config-file",
+		Usage: "The path to a YAML file with chain config values",
+	}
 )
diff --git a/shared/params/BUILD.bazel b/shared/params/BUILD.bazel
index 8a0fb741b6ef..ef2940a1a0a5 100644
--- a/shared/params/BUILD.bazel
+++ b/shared/params/BUILD.bazel
@@ -5,6 +5,7 @@ go_library(
     name = "go_default_library",
     srcs = [
         "config.go",
+        "loader.go",
         "network_config.go",
     ],
     importpath = "github.com/prysmaticlabs/prysm/shared/params",
@@ -12,12 +13,22 @@ go_library(
     deps = [
         "//shared/bytesutil:go_default_library",
         "@com_github_mohae_deepcopy//:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+        "@in_gopkg_yaml_v2//:go_default_library",
     ],
 )
 
 go_test(
     name = "go_default_test",
     size = "small",
-    srcs = ["config_test.go"],
+    srcs = [
+        "config_test.go",
+        "loader_test.go",
+    ],
+    data = glob(["*.yaml"]) + [
+        "@eth2_spec_tests_mainnet//:test_data",
+        "@eth2_spec_tests_minimal//:test_data",
+    ],
     embed = [":go_default_library"],
+    deps = ["@io_bazel_rules_go//go/tools/bazel:go_default_library"],
 )
diff --git a/shared/params/config.go b/shared/params/config.go
index 50b23c1df2e5..fac734657000 100644
--- a/shared/params/config.go
+++ b/shared/params/config.go
@@ -55,7 +55,7 @@ type BeaconChainConfig struct {
 	MinValidatorWithdrawabilityDelay uint64 `yaml:"MIN_VALIDATOR_WITHDRAWABILITY_DELAY"` // MinValidatorWithdrawabilityDelay is the shortest amount of time a validator has to wait to withdraw.
 	PersistentCommitteePeriod        uint64 `yaml:"PERSISTENT_COMMITTEE_PERIOD"`         // PersistentCommitteePeriod is the minimum amount of epochs a validator must participate before exiting.
 	MinEpochsToInactivityPenalty     uint64 `yaml:"MIN_EPOCHS_TO_INACTIVITY_PENALTY"`    // MinEpochsToInactivityPenalty defines the minimum amount of epochs since finality to begin penalizing inactivity.
-	Eth1FollowDistance               uint64 `yaml:"EPOCHS_PER_ETH1_VOTING_PERIOD"`       // Eth1FollowDistance is the number of eth1.0 blocks to wait before considering a new deposit for voting. This only applies after the chain as been started.
+	Eth1FollowDistance               uint64 // Eth1FollowDistance is the number of eth1.0 blocks to wait before considering a new deposit for voting. This only applies after the chain as been started.
 	SafeSlotsToUpdateJustified       uint64 // SafeSlotsToUpdateJustified is the minimal slots needed to update justified check point.
 	SecondsPerETH1Block              uint64 `yaml:"SECONDS_PER_ETH1_BLOCK"` // SecondsPerETH1Block is the approximate time for a single eth1 block to be produced.
 	// State list lengths
diff --git a/shared/params/loader.go b/shared/params/loader.go
new file mode 100644
index 000000000000..482708f9592f
--- /dev/null
+++ b/shared/params/loader.go
@@ -0,0 +1,118 @@
+package params
+
+import (
+	"encoding/hex"
+	"io/ioutil"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+	"gopkg.in/yaml.v2"
+)
+
+// LoadChainConfigFile load, convert hex values into valid param yaml format,
+// unmarshal , and apply beacon chain config file.
+func LoadChainConfigFile(chainConfigFileName string) {
+	yamlFile, err := ioutil.ReadFile(chainConfigFileName)
+	if err != nil {
+		log.WithError(err).Fatal("Failed to read chain config file.")
+	}
+	// Convert 0x hex inputs to fixed bytes arrays
+	lines := strings.Split(string(yamlFile), "\n")
+	for i, line := range lines {
+		if !strings.HasPrefix(line, "#") && strings.Contains(line, "0x") {
+			parts := replaceHexStringWithYAMLFormat(line)
+			lines[i] = strings.Join(parts, "\n")
+		}
+	}
+	yamlFile = []byte(strings.Join(lines, "\n"))
+	conf := BeaconConfig()
+	if err := yaml.Unmarshal(yamlFile, conf); err != nil {
+		log.WithError(err).Fatal("Failed to parse chain config yaml file.")
+	}
+	log.Debugf("Config file values: %+v", conf)
+	OverrideBeaconConfig(conf)
+}
+
+func replaceHexStringWithYAMLFormat(line string) []string {
+	parts := strings.Split(line, "0x")
+	b, err := hex.DecodeString(parts[1])
+	if err != nil {
+		log.WithError(err).Error("Failed to decode hex string.")
+	}
+	switch l := len(b); {
+	case l == 1:
+		var byte byte
+		byte = b[0]
+		fixedByte, err := yaml.Marshal(byte)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[0] = parts[0] + string(fixedByte)
+		parts = parts[:1]
+	case l > 1 && l <= 4:
+		var arr [4]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	case l > 4 && l <= 8:
+		var arr [8]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	case l > 8 && l <= 16:
+		var arr [16]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	case l > 16 && l <= 20:
+		var arr [20]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	case l > 20 && l <= 32:
+		var arr [32]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	case l > 32 && l <= 48:
+		var arr [48]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	case l > 48 && l <= 64:
+		var arr [64]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	case l > 64 && l <= 96:
+		var arr [96]byte
+		copy(arr[:], b)
+		fixedByte, err := yaml.Marshal(arr)
+		if err != nil {
+			log.WithError(err).Error("Failed to marshal config file.")
+		}
+		parts[1] = string(fixedByte)
+	}
+	return parts
+}
diff --git a/shared/params/loader_test.go b/shared/params/loader_test.go
new file mode 100644
index 000000000000..aaea940e0912
--- /dev/null
+++ b/shared/params/loader_test.go
@@ -0,0 +1,117 @@
+package params
+
+import (
+	"path"
+	"strings"
+	"testing"
+
+	"github.com/bazelbuild/rules_go/go/tools/bazel"
+)
+
+func TestLoadConfigFile(t *testing.T) {
+	mainnetConfigFile := ConfigFilePath(t, "mainnet")
+	LoadChainConfigFile(mainnetConfigFile)
+	if BeaconConfig().MaxCommitteesPerSlot != MainnetConfig().MaxCommitteesPerSlot {
+		t.Errorf("Expected MaxCommitteesPerSlot to be set to mainnet value: %d found: %d",
+			MainnetConfig().MaxCommitteesPerSlot,
+			BeaconConfig().MaxCommitteesPerSlot)
+	}
+	if BeaconConfig().SecondsPerSlot != MainnetConfig().SecondsPerSlot {
+		t.Errorf("Expected SecondsPerSlot to be set to mainnet value: %d found: %d",
+			MainnetConfig().SecondsPerSlot,
+			BeaconConfig().SecondsPerSlot)
+	}
+	minimalConfigFile := ConfigFilePath(t, "minimal")
+	LoadChainConfigFile(minimalConfigFile)
+	if BeaconConfig().MaxCommitteesPerSlot != MinimalSpecConfig().MaxCommitteesPerSlot {
+		t.Errorf("Expected MaxCommitteesPerSlot to be set to minimal value: %d found: %d",
+			MinimalSpecConfig().MaxCommitteesPerSlot,
+			BeaconConfig().MaxCommitteesPerSlot)
+	}
+	if BeaconConfig().SecondsPerSlot != MinimalSpecConfig().SecondsPerSlot {
+		t.Errorf("Expected SecondsPerSlot to be set to minimal value: %d found: %d",
+			MinimalSpecConfig().SecondsPerSlot,
+			BeaconConfig().SecondsPerSlot)
+	}
+}
+
+func Test_replaceHexStringWithYAMLFormat(t *testing.T) {
+
+	testLines := []struct {
+		line   string
+		wanted string
+	}{
+		{
+			line:   "ONE_BYTE: 0x41",
+			wanted: "ONE_BYTE: 65\n",
+		},
+		{
+			line:   "FOUR_BYTES: 0x41414141",
+			wanted: "FOUR_BYTES: \n- 65\n- 65\n- 65\n- 65\n",
+		},
+		{
+			line:   "THREE_BYTES: 0x414141",
+			wanted: "THREE_BYTES: \n- 65\n- 65\n- 65\n- 0\n",
+		},
+		{
+			line:   "EIGHT_BYTES: 0x4141414141414141",
+			wanted: "EIGHT_BYTES: \n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n",
+		},
+		{
+			line: "SIXTEEN_BYTES: 0x41414141414141414141414141414141",
+			wanted: "SIXTEEN_BYTES: \n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n",
+		},
+		{
+			line: "TWENTY_BYTES: 0x4141414141414141414141414141414141414141",
+			wanted: "TWENTY_BYTES: \n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n",
+		},
+		{
+			line: "THIRTY_TWO_BYTES: 0x4141414141414141414141414141414141414141414141414141414141414141",
+			wanted: "THIRTY_TWO_BYTES: \n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n",
+		},
+		{
+			line: "FORTY_EIGHT_BYTES: 0x41414141414141414141414141414141414141414141414141414141414141414141" +
+				"4141414141414141414141414141",
+			wanted: "FORTY_EIGHT_BYTES: \n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n",
+		},
+		{
+			line: "NINETY_SIX_BYTES: 0x414141414141414141414141414141414141414141414141414141414141414141414141" +
+				"4141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141" +
+				"41414141414141414141414141",
+			wanted: "NINETY_SIX_BYTES: \n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n" +
+				"- 65\n- 65\n- 65\n- 65\n- 65\n- 65\n",
+		},
+	}
+	for _, line := range testLines {
+		parts := replaceHexStringWithYAMLFormat(line.line)
+		res := strings.Join(parts, "\n")
+
+		if res != line.wanted {
+			t.Errorf("expected conversion to be: %v got: %v", line.wanted, res)
+		}
+	}
+}
+
+// ConfigFilePath sets the proper config and returns the relevant
+// config file path from eth2-spec-tests directory.
+func ConfigFilePath(t *testing.T, config string) string {
+	configFolderPath := path.Join("tests", config)
+	filepath, err := bazel.Runfile(configFolderPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	configFilePath := path.Join(filepath, "config.yaml")
+	return configFilePath
+}
diff --git a/shared/testutil/spectest.go b/shared/testutil/spectest.go
index 8312e1580445..115706e3c4cd 100644
--- a/shared/testutil/spectest.go
+++ b/shared/testutil/spectest.go
@@ -56,7 +56,6 @@ func TestFolders(t *testing.T, config string, folderPath string) ([]os.FileInfo,
 	return testFolders, testsFolderPath
 }
 
-
 // BazelDirectoryNonEmpty returns true if directory exists and is not empty.
 func BazelDirectoryNonEmpty(filePath string) (bool, error) {
 	p, err := bazel.Runfile(filePath)