Defendant, the Administratrix of the Estate of Leon Reece Penland, Jr., 1 appeals from an order of the trial court denying her motion for summary judgment and granting summary judgment to plaintiffs Vivian and Michael Harrison Gregory, Jill Ann and William Bryan Ward, and Shirley and Joseph Snapp with respect to defendant’s affirmative defenses of res judicata and collateral estoppel. As the issues presented in these separate appeals involve common *507 questions of law, we have consolidated the appeals for purposes of decision.
Defendant contends that a finding of the North Carolina Industrial Commission, in an action brought under the State Tort Claims Act, that Leon Reece Penland, Jr. (“SPC Penland”) was not grossly negligent precludes recovery in this case under N.C. Gen. Stat. § 166A-14 (2005). Because, however, the Industrial Commission proceeding and this action do not involve an identity of claims or parties, the doctrine of res judicata is inapplicable. Further, the Commission had no jurisdiction to make any finding regarding SPC Penland, and, therefore, the gross negligence finding cannot be a basis for collateral estoppel. Accordingly, we hold the trial court properly granted summary judgment on defendant’s affirmative defenses.
Facts
The facts of this case are largely undisputed. On 14 September 1999, following Hurricane Floyd, North Carolina Governor James B. Hunt, Jr. issued a Proclamation of a State of Disaster for the North Carolina coastline under the North Carolina Emergency Management Act, N.C. Gen. Stat. §§ 166A-1 through -53 (2005). As part of the' Emergency Operations Plan, the North Carolina National Guard, including SPC Penland, was called to active duty in the area of Oak Island, North Carolina. The National Guard and volunteers, including plaintiffs Jill Ward, Michael Gregory, and Shirley Snapp, performed beach patrols in which they attempted to keep people off of the beaches.
Late in the evening on 22 September 1999, SPC Penland was waiting at a local fire department for another National Guard member. While there, SPC Penland met Ms. Ward, Mr. Gregory, and Ms. Snapp, who told SPC Penland that they were bored and were interested in riding in a Humvee. Although he had never previously driven a Humvee on a beach, SPC Penland offered to take the group in a Humvee on a beach patrol.
SPC Penland drove east along the beach until the end of the island, turned around, “gunned the engine,” and “did a little fish-tail” before straightening back out. Although Mr. Gregory advised SPC Penland to follow his outbound tracks and stay on the hard-packed sand if he wished to increase the speed, SPC Penland drove toward the softer sand by the dunes and “acceleratfed] to significantly higher *508 speeds than he had originally driven.” As the Humvee bounced over the dunes, “the vehicle became airborne,” then “landed and . . . vaulted again.”
When it landed for the second time, the Humvee flipped over. All three passengers were injured, and SPC Penland was thrown from the vehicle and killed. No one had seen the speedometer, but Ms. Ward and Ms. Snapp believed the vehicle had been going “extremely fast,” which Ms. Ward estimated to be about 50 or 55 miles per 'hour. Mr. Gregory estimated that the Humvee had been going between 40 and 50 miles per hour.
Plaintiffs ultimately filed a complaint against defendant in Brunswick County Superior Court alleging gross negligence by SPC Penland. Based on the same facts, plaintiffs also brought an action in the Industrial Commission against the North Carolina National Guard under the State Tort Claims Act, N.C. Gen. Stat. §§ 143-291 through -300.1A (2005). Prior to the adjudication of plaintiffs’ claims in superior court, Deputy Commissioner Morgan S. Chapman denied plaintiffs’ claims in the Industrial Commission. Plaintiffs appealed and, on 2 December 2003, the Full Commission likewise entered an opinion and award in favor of the State.
The Commission relied upon N.C. Gen. Stat. § 166A-14(a), which provides:
(a) All functions hereunder and all other activities relating to emergency management are hereby declared to be governmental functions. Neither the State nor any political subdivision thereof, nor, except in cases of willful misconduct, gross negligence or bad faith, any emergency management worker complying with or reasonably attempting to comply with this Article or any order, rule or regulation promulgated pursuant to the provisions of this Article or pursuant to any ordinance relating to any emergency management measures enacted by any political subdivision of the State, shall be liable for the death of or injury to persons, or for damage to property as a result of any such activity.
Applying this statute, the Commission found that SPC Penland “was an emergency management worker acting within the course of his employment” on the date of the accident and that he had “breached his duty of care” toward plaintiffs. The Commission concluded, however, that plaintiffs were not entitled to recover under the State Tort Claims Act because the Emergency Management Act *509 did not permit recovery against the State for an emergency management worker’s actions “committed during emergency management operations.” The Commission further found that SPC Penland’s “actions did not rise to the level required in order to constitute gross negligence,” as required for individual liability under the Emergency Management Act. Plaintiffs ultimately chose not to appeal the Full Commission’s decision.
Subsequently, defendant moved for summary judgment in superior court, contending that the Commission’s finding that SPC Penland was not grossly negligent precluded plaintiffs’ action based on res judicata and collateral estoppel. The court disagreed and instead entered summary judgment for plaintiffs on defendant’s defenses of res judicata and collateral estoppel. Defendant timely appealed to this Court.
Discussion
As an initial matter, we must address whether this Court has jurisdiction to hear defendant’s appeal since it involves an interlocutory order. An order is interlocutory if “it is made during the pendency of an action and does not dispose of the case but requires further action by the trial court in order to finally determine the entire controversy.”
Howerton v. Grace Hosp., Inc.,
An interlocutory order is subject to immediate appeal only if (1) the order is final as to some but not all of the claims or parties, and the trial court certifies the case for appeal pursuant to Rule 54(b) of the Rules of Civil Procedure, or (2) the trial court’s decision deprives the appellant of a substantial right that will be lost absent immediate review. Id. Because the trial court did not include a Rule 54(b) certification in its order, we have jurisdiction over defendant’s appeal only if the trial court’s order deprived defendant of a substantial right.
“ ‘The right to avoid one trial on . . . disputed issues is not normally a substantial right that would allow an interlocutory appeal, [but] the right to avoid the possibility of two trials on the same issues can be such a substantial right.’ ”
Green v. Duke Power Co.,
Because the issues raised by defendant on appeal, if resolved in her favor, meet these criteria, we hold that defendant has sufficiently demonstrated the existence of a substantial right that would be lost if we waited to review these issues until after a final judgment.
See Bockweg v. Anderson,
I
Our Supreme Court recently explained that “[u]nder the doctrine of res judicata or ‘claim preclusion,’ a final judgment on the merits in one action precludes a second suit based on the same cause of action between the same parties or their privies.”
Whitacre P’ship v. Biosignia, Inc.,
In the Industrial Commission, plaintiffs brought a claim against the State under the State Tort Claims Act, while the action currently on appeal is a common-law claim against an individual. Our Supreme
*511
Court has previously held that a claim against the State in the Industrial Commission “did not constitute
another action
pending
between the same parties
for the same cause” as an action filed in superior court against a state employee.
Wirth v. Bracey,
This view is confirmed by
Meyer v. Walls,
Furthermore, the fact that the Tort Claims Act provides for subject matter jurisdiction in the Industrial Commission over a negligence claim against the State does not preclude a claim against defendants in Superior Court. A plaintiff may maintain both a suit against a state agency in the Industrial Commission under the Tort Claims Act and a suit against the negligent agent or employee in the General Court of Justice for common-law negligence.
If, under Meyer, a plaintiff may properly bring both a claim in the Industrial Commission and a claim in superior court, then the causes of action cannot be identical. 2 The Commission’s decision thus does not meet the second requirement of res judicata.
With respect to the third element of res judicata, since the parties were not identical, defendant must establish that SPC Penland was in privity with the North Carolina National Guard. “ ‘[Pjrivity’ for purposes of
res judicata ...
denotes a mutual or successive relationship to the same rights of property.”
State ex rel. Tucker v. Frinzi,
*512
Typically, “[i]n order for a person to be privy to an action, he must have acquired an interest in the subject matter of the action either by succession, inheritance, or purchase from a party subsequent to the action.”
Smith v. Smith,
Moreover, our Supreme Court has held:
One is ‘privy,’ when the term is applied to a judgment or decree, whose interest has been legally represented at the trial. A party will not be concluded by a former judgment unless he could have used it as a protection, or as a foundation of a claim, had the judgment been the other way.
Masters v. Dunstan,
Defendant cites
Brotherton v. Paramore,
Res judicata does not, therefore, bar plaintiffs’ claims. We now turn to defendant’s arguments regarding collateral estoppel.
II
The Industrial Commission, in addition to concluding that the State could not be held liable under N.C. Gen. Stat. § 166A-14(a), found that “[although [SPC Penland] breached his duty of care to his three passengers by driving too fast, his actions did not rise to the level required in order to constitute gross negligence.” A state employee may not be held liable under N.C. Gen. Stat. § 166A-14(a) unless grossly negligent, engaging in willful misconduct, or acting in bad faith. Defendant contends that collateral estoppel precludes plaintiffs from relitigating whether SPC Penland’s actions constituted gross negligence.
In
Whitacre Partnership,
the Supreme Court explained that “[w]hereas res judicata estops a party or its privy from bringing a subsequent action based on the ‘same claim’ as that litigated in an earlier action, collateral estoppel precludes the subsequent adjudication of a previously determined issue, even if the subsequent action is based on an entirely different claim.”
We have already concluded that the decision of the Full Commission constituted a final judgment on the merits. Moreover, because defendant is attempting to defensively invoke collateral estop-pel to preclude plaintiffs from relitigating the issue of SPC Penland’s gross negligence, the mutuality requirement does not apply. Finally, as the parties do not dispute, and we see no reason to doubt, that the issue of SPC Penland’s gross negligence before the Industrial Commission is “identical to” the issue of SPC Penland’s gross negligence at common law, all that remains for us to determine is whether this issue was “actually litigated and necessary to the [Commission’s] judgment.”
Hall,
On this question, this Court has held: “[W]here the court adjudicating the prior proceeding lacked jurisdiction over an issue, the [actually litigated and necessary] element of collateral estoppel has not been met.”
Meehan v. Cable,
The plaintiff subsequently filed a complaint in the Industrial Commission under the State Tort Claims Act, alleging he had been injured by the State’s negligence. Id. The defendant contended that the dismissal of plaintiff’s claims in superior court precluded plaintiff’s claims in the Industrial Commission. Id. at 198, 479 S.E.2d at *515 803. In holding that the “actually litigated” requirement of collateral estoppel was not satisfied, this Court explained:
Pursuant to the State Tort Claims Act, exclusive original jurisdiction of claims against the State or its institutions and agencies, in which injury is alleged to have occurred as a result of the negligence of an employee of the State, is vested in the North Carolina Industrial Commission. Thus, plaintiff’s negligence claim against defendant hospital could not have been adjudicated in the prior proceeding because the Superior Court had no jurisdiction over a tort claim against the State.
Id.,
Likewise, in this case, the Industrial Commission lacked jurisdiction to address SPC Penland’s gross negligence. “[T]he Tort Claims Act does not confer jurisdiction in the Industrial Commission over a claim against an employee of a state agency.”
Meyer,
The Emergency Management Act, however, provides that “[n] either the State nor any political subdivision thereof, nor, except in cases of willful misconduct, gross negligence or bad faith, any emergency management worker complying with or reasonably attempting to comply with this Article ... shall be liable for the death of or injury to persons . . . .” N.C. Gen. Stat. § 166A-14(a). We agree with the Full Commission that, under N.C. Gen. Stat. § 166A-14(a), the State has maintained its sovereign immunity with respect to emergency management operations. The Commission, therefore, had no jurisdiction to hear plaintiffs’ claims filed in the Industrial Commission and could not properly make any findings on the parties’ factual allegations.
See Vereen v. N.C. Dep’t of Corr.,
Accordingly, under
Alt,
because of this lack of jurisdiction, plaintiffs’ claim of gross negligence under the Emergency Management Act was not “actually litigated” before the Commission or “necessary” to its judgment, and, therefore, plaintiffs are not collaterally estopped
*516
by the Commission’s finding on that issue.
See also Templeton v. Apex Homes, Inc.,
Affirmed.
Notes
. Originally, plaintiffs sued Leon Reece Penland, Sr. as the administrator of SPC Penland’s estate. Subsequently, Merinda S. Woody was substituted as the administratrix.
. Res judicata also bars a party from filing a subsequent action for any claims that could have been asserted in the prior action.
Rodgers Builders, Inc. v. McQueen,
