diff --git a/builder/virtualbox/iso/builder.go b/builder/virtualbox/iso/builder.go
index 14cbafb22..bd008548b 100644
--- a/builder/virtualbox/iso/builder.go
+++ b/builder/virtualbox/iso/builder.go
@@ -44,6 +44,14 @@ type Config struct {
 	vboxcommon.VBoxVersionConfig    `mapstructure:",squash"`
 	vboxcommon.VBoxBundleConfig     `mapstructure:",squash"`
 	vboxcommon.GuestAdditionsConfig `mapstructure:",squash"`
+	// The chipset to be used: PIIX3 or ICH9.
+	// When set to piix3, the firmare is PIIX3. This is the default.
+	// When set to ich9, the firmare is ICH9.
+	Chipset string `mapstructure:"chipset" required:"false"`
+	// The firmware to be used: BIOS or EFI.
+	// When set to bios, the firmare is BIOS. This is the default.
+	// When set to efi, the firmare is EFI.
+	Firmware string `mapstructure:"firmware" required:"false"`
 	// The size, in megabytes, of the hard disk to create for the VM. By
 	// default, this is 40000 (about 40 GB).
 	DiskSize uint `mapstructure:"disk_size" required:"false"`
@@ -162,6 +170,28 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, []string, error) {
 	errs = packersdk.MultiErrorAppend(errs, b.config.BootConfig.Prepare(&b.config.ctx)...)
 	errs = packersdk.MultiErrorAppend(errs, b.config.GuestAdditionsConfig.Prepare(b.config.CommConfig.Comm.Type)...)
 
+	if b.config.Chipset == "" {
+		b.config.Chipset = "piix3"
+	}
+	switch b.config.Chipset {
+	case "piix3", "ich9":
+		// do nothing
+	default:
+		errs = packersdk.MultiErrorAppend(
+			errs, errors.New("chipset can only be piix3 or ich9"))
+	}
+
+	if b.config.Firmware == "" {
+		b.config.Firmware = "bios"
+	}
+	switch b.config.Firmware {
+	case "bios", "efi":
+		// do nothing
+	default:
+		errs = packersdk.MultiErrorAppend(
+			errs, errors.New("firmware can only be bios or efi"))
+	}
+
 	if b.config.DiskSize == 0 {
 		b.config.DiskSize = 40000
 	}
diff --git a/builder/virtualbox/iso/builder.hcl2spec.go b/builder/virtualbox/iso/builder.hcl2spec.go
index a931724c1..04faf34f6 100644
--- a/builder/virtualbox/iso/builder.hcl2spec.go
+++ b/builder/virtualbox/iso/builder.hcl2spec.go
@@ -117,6 +117,8 @@ type FlatConfig struct {
 	GuestAdditionsPath        *string           `mapstructure:"guest_additions_path" cty:"guest_additions_path" hcl:"guest_additions_path"`
 	GuestAdditionsSHA256      *string           `mapstructure:"guest_additions_sha256" cty:"guest_additions_sha256" hcl:"guest_additions_sha256"`
 	GuestAdditionsURL         *string           `mapstructure:"guest_additions_url" required:"false" cty:"guest_additions_url" hcl:"guest_additions_url"`
+	Chipset                   *string           `mapstructure:"chipset" required:"false" cty:"chipset" hcl:"chipset"`
+	Firmware                  *string           `mapstructure:"firmware" required:"false" cty:"firmware" hcl:"firmware"`
 	DiskSize                  *uint             `mapstructure:"disk_size" required:"false" cty:"disk_size" hcl:"disk_size"`
 	GuestOSType               *string           `mapstructure:"guest_os_type" required:"false" cty:"guest_os_type" hcl:"guest_os_type"`
 	HardDriveDiscard          *bool             `mapstructure:"hard_drive_discard" required:"false" cty:"hard_drive_discard" hcl:"hard_drive_discard"`
@@ -249,6 +251,8 @@ func (*FlatConfig) HCL2Spec() map[string]hcldec.Spec {
 		"guest_additions_path":         &hcldec.AttrSpec{Name: "guest_additions_path", Type: cty.String, Required: false},
 		"guest_additions_sha256":       &hcldec.AttrSpec{Name: "guest_additions_sha256", Type: cty.String, Required: false},
 		"guest_additions_url":          &hcldec.AttrSpec{Name: "guest_additions_url", Type: cty.String, Required: false},
+		"chipset":                      &hcldec.AttrSpec{Name: "chipset", Type: cty.String, Required: false},
+		"firmware":                     &hcldec.AttrSpec{Name: "firmware", Type: cty.String, Required: false},
 		"disk_size":                    &hcldec.AttrSpec{Name: "disk_size", Type: cty.Number, Required: false},
 		"guest_os_type":                &hcldec.AttrSpec{Name: "guest_os_type", Type: cty.String, Required: false},
 		"hard_drive_discard":           &hcldec.AttrSpec{Name: "hard_drive_discard", Type: cty.Bool, Required: false},
diff --git a/builder/virtualbox/iso/step_create_vm.go b/builder/virtualbox/iso/step_create_vm.go
index 15a049a12..5cce54db9 100644
--- a/builder/virtualbox/iso/step_create_vm.go
+++ b/builder/virtualbox/iso/step_create_vm.go
@@ -26,7 +26,7 @@ func (s *stepCreateVM) Run(ctx context.Context, state multistep.StateBag) multis
 
 	name := config.VMName
 
-	commands := make([][]string, 6)
+	commands := make([][]string, 8)
 	commands[0] = []string{
 		"createvm", "--name", name,
 		"--ostype", config.GuestOSType, "--register",
@@ -45,6 +45,9 @@ func (s *stepCreateVM) Run(ctx context.Context, state multistep.StateBag) multis
 		commands[5] = []string{"modifyvm", name, "--audio", config.HWConfig.Sound, "--audioin", "on", "--audioout", "on"}
 	}
 
+	commands[6] = []string{"modifyvm", name, "--chipset", config.Chipset}
+	commands[7] = []string{"modifyvm", name, "--firmware", config.Firmware}
+
 	ui.Say("Creating virtual machine...")
 	for _, command := range commands {
 		err := driver.VBoxManage(command...)