dehvered the Opinion of the Court.
1 1 We accepted transfer of this case from the court of appeals pursuant to section 13-4-109, C.R.S. (2015) and C.A.R. 50 because *150the issues raised involve matters of substance not previously determined by this court, and because this court granted certio-rari in two cases raising similar issues.1 In City of Littleton v. Industrial Claim Appeals Office, 2016 CO 25, 370 P.3d 157, and Industrial Claim Appeals Office v. Town of Castle Rock, 2016 CO 26, 370 P.3d 151, both. announced today, we set forth our interpretation of section 8-41-209, C.R.S. (2015), of the Workers' Compensation Act of Colorado, which provides workers' compensation coverage, under certain conditions, for occupatmn— al diseases affecting firefighters.
12 In City of Littleton, 2016 CO 25, 370 P.3d 157, and Town of Castle Rock, 2016 CO 26, 370 P.3d 151, we held that section 8-41-209(2)(a) establishes a presumption that a qualifying firefighter's cancer "resultfed] from his employment as a firefighter," and that section 8-41-209(2)(b) shifts the burden of persuasion to the employer or insurer to show, by a preponderance of the medical evidence, that the firefighter's condition "did not occur on the job." We further held that an employer can meet its burden by establishing the absence of either. general or specific causation. Specifically, an employer can show, by a preponderance of the medical evidence, either; (1) that a firefighter's known or typical occupational exposures are not capable of causing the type of cancer at issue, or (2) that the firefighter's employment did not cause the firefighter's particular cancer where, for example, the claimant firefighter was not exposed to the cancer-causing agent, or where the medical evidence renders it more probable that the cause of the claimant's cancer was not job-related. City of Littleton, ¶¶ 13, 25, 39. In Town of Castle Rock, ¶¶ 3, 17, 27, we further held that to meet its burden of proof, the employer is not required to prove a specific alternate cause of the firefighter's cancer. Rather, the employer need only establish, by a preponderance of the medical evidence, that the firefighter's employment did not cause the firefighter's cancer because the firefighter's particular risk factors render if more probable that the firefighter's cancer arose from a source outside the workplace. Id. at 1% 17, 27.
' T3 In this case, Englewood firefighter Del-vin Harrell was diagnosed with melanoma. He underwent surgery to remove the melanoma and sought workers' compensation benefits under section 841-209, asserting that his melanoma qualified as a compensable oc-cupatwnal disease. As in Town of Castle Rock, the Clty of Englewood and its insurer, the Colorado Intergovernmental Risk Sharing Agency (collectively, "Englewood") sought to overcome the presumption that the claimant's melanoma resulted from his employment as a firefighter. by presenting risk-factor evidence indicating that the claimant's risk of melanoma from other sources is greater than his risk of melanoma from firefighting. Relying on the court of appeals' analysis in City of Littleton v. Indus. Claim Appeals Office, 2012 COA 187, — P.3d —, the ALJ concluded that Englewood failed to overcome the presumption in section 8-41-209(2)(a). ° A panel of the Industrial Claim Appeals Office (“Panel”) affirmed the ALJ’ order.
* {4 Because the ALJ and the Panel in this case did not have the benefit of our analysis in City of Littleton and Toum of Castle Rock, we set aside the Panel's order affirming the ALJ and remand this case to the Panel with directions to return the matter to the ALJ for reconsideration in light of our decisions announced today in City of Liféleton and Town of Castle Rock.
. We accepted transfer of this case under C.A.R. 50 to address the following issues:
1. Whether the Administrative Law Judge incorrectly applied the Idw set forth in § 8-41-209, C.R.S. by finding that respondents cannot meet their burden of proof in overcoming the statutory presumption through medical evidence of non-occupational risk factors that were the more likely cause of claimant's condition or impairment.
2, Whether the Administrative Law Judge in- " correctly applied the law set forth in § 8-41-209,.C.R.S. by applying a heightened burden of proof in requiring the employer to prove the, actual cause of claimant's cancer in order to sufficiently rebut the statutory presumption 'of compensability of claimant's melanoma. ° .