Full-Time
Manager, Tax Accounting & Reporting
Updated on 9/4/2026
Mallinckrodt
1,001-5,000 employees
Specialty pharmaceutical developer, manufacturer, distributor
No salary listed
Malvern, PA, USA + 1 more
More locations: Hazelwood, MO, USA
Hybrid
Hybrid work is required.
Bachelor's, Master's
 Accounting (1) |
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- A Bachelor's degree in accounting is required.
- At least 5 years of tax accounting experience working with public company income tax provisions in an in-house or national accounting firm setting is required.
- A strong understanding of income tax accounting and reporting concepts is required.
- Proficiency in OneSource tax provision and compliance software is required.
- The ability to analyze and support accounting conclusions related to complex transactions is required.
- Sound technical judgment with appropriate escalation of issues and risks is required.
- Strong organizational skills and the ability to manage competing deadlines in a fast-paced environment are required.
- Effective written and verbal communication skills are required.
- The ability to collaborate across functions and interact with internal and external stakeholders is required.
- High integrity and commitment to controls and corporate governance are required.
- Assist in preparing and reviewing the quarterly and annual consolidated income tax provision under ASC 740, including current and deferred taxes, uncertain tax positions, and effective tax rate analyses.
- Support integrating acquired business units or entities into the consolidated income tax provision and tax returns, including understanding key tax adjustments and identified risks.
- Assist with income tax reporting analysis of internal transactions and business changes, collaborating with tax planning and other tax team members as appropriate.
- Support preparing tax reporting deliverables, including United States and international tax returns, provision-to-return analyses, variance explanations, and management reporting.
- Monitor United States tax legislation and regulatory developments and assist with evaluating and documenting their impact on the Company's tax accounting and reporting.
- Assist with Sarbanes-Oxley documentation and internal controls, and support income tax-related audit procedures.
- Coordinate with external advisors and respond to external auditors' information requests concerning tax accounting and reporting matters.
- Support administration and use of OneSource tax provision and reporting technology tools, including data gathering and validation.
- Identify process improvements and efficiencies within the tax accounting and tax reporting compliance cycle.
- Partner with corporate tax, accounting, and finance teams to ensure accurate and timely tax reporting.
- Assist in training and developing tax accountants and senior tax accountants.
- Contribute to a control-focused tax environment.
- A Master of Science in Taxation is a plus.
- Certified Public Accountant certification is strongly preferred.
Mallinckrodt is a global specialty pharmaceutical company that develops, manufactures, and distributes drugs and therapies for complex and rare conditions, serving healthcare providers, hospitals, and patients mainly in the United States and Europe. Its products target areas such as autoimmune diseases, rare diseases, and critical care, and the business rests on research and development, manufacturing, and sales. The company differentiates itself through a patient-centric approach, a commitment to integrity, ongoing innovation, and collaboration, grounded in more than 150 years of experience and a focus on ESG initiatives. Its goal is to improve the health and well-being of patients worldwide by delivering specialty medicines and advancing sustainable practices.
Company Size
1,001-5,000
Company Stage
IPO
Headquarters
Hazelwood, Missouri
Founded
1867
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Simplify's Take
What believers are saying
- Q2 2026 Acthar Gel net sales reached $205 million, up 17%.
- August 11, 2026 guidance raised, with 2026 pro forma sales up to $2.0 billion.
- Management now plans a 2027 NYSE listing after integration progress.
What critics are saying
- Maine DEP sued Mallinckrodt US LLC on August 25, 2026 over Orrington cleanup failures.
- Keenova reported a $221 million Q2 2026 loss from continuing operations.
- A failed 2027 NYSE listing traps Keenova with debt, litigation, and reputational damage.
What makes Mallinckrodt unique
- Keenova’s Acthar Gel and XIAFLEX franchises drive branded rare-disease cash flows.
- July 31, 2025 Endo merger combined branded therapies with scale and synergies.
- November 2025 Par Health spinout left a pure-play specialty therapeutics company.
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Benefits
Performance Bonus
Relocation Assistance
Growth & Insights and Company News
6 month growth
↓ -5%1 year growth
↓ -5%2 year growth
↓ -5%Maine DEP sues Mallinckrodt over failures to clean up contaminated Orrington site. The Department of Environmental Protection has filed a lawsuit against Mallinckrodt US LLC, accusing the company of failing to clean up mercury contamination at its site in Orrington. The department filed the complaint in Penobscot Superior Court Tuesday, and in court records the department said the company has stopped "meaningful work" at the site despite department orders and notices of violations. Jesse Graham is the co-director of the Maine People's Alliance - which, independent from the state enforcement actions, sued Mallinckrodt over the contamination in federal court in 2000. "We have for a long time been calling for the thorough cleanup of that site, and we have definitely been disappointed that Mallinckrodt has not cleaned it up to the standards that the Maine DEP has set," Graham said. "We fully support the Maine DEP continuing to pressure them and whatever legal tactics they need to do to compel them to finish and do a thorough cleanup of all the pollution that Mallinckrodt has left on the site." Considered the most contaminated site in Maine, the property is the former HoltraChem chloralkali manufacturing facility. Located adjacent to the Penobscot River, the facility operated from 1967 through 2000, and manufactured caustic soda, chlorine bleach and pesticides. In court documents, the department said Mallinckrodt has complained about the difficulties and high costs of cleaning up the site. But, the department said, "this is no excuse for Mallinckrodt's ongoing failure to adhere to the cleanup standards and other requirements of the orders." The department is asking the court for civil penalties, and to order Mallinckrodt to comply with all department orders and submit a plan to remove all soil and solid materials from the site. Attempts to reach someone who could speak on behalf of Mallinckrodt were unsuccessful. The DEP and the U.S. Environmental Protection Agency first began pursuing clean up at the site in the mid-1980s, including negotiations with the company in 2002. But after failing to reach an agreement, in 2008 the department issued a unilateral cleanup order for the site. But Mallinckrodt appealed that order, first to the Board of Environmental Protection, and then in state courts. Ultimately, the state supreme court upheld the department's order in 2014. The department issued notices of violations to Mallinckrodt in May and October of 2025, over the ongoing issues, but said the company still failed to address the shortcomings of their proposed cleanup plans. There is also the federal court case filed by the Maine People's Alliance, which is separate from the state proceedings involving the department. In 2022, Mallinckrodt settled the federal case, and agreed to pay at least $187 million to address mercury pollution in the Penobscot River. Graham said some of that agreed-up work is underway now, as Mallinckrodt adds sand to several coves along the river with high levels of mercury, a process known as "capping."
DEP sues to compel cleanup of 'most contaminated site in Maine' BY Susan Cover Maine PUBLISHED 10:13 AM ET Aug. 27, 2026 AUGUSTA - State officials are escalating action against a company they say has failed to clean up "the most contaminated site in Maine" after more than 20 years of lawsuits. The Maine Department of Environmental Protection filed a formal complaint Tuesday in Penobscot County Superior Court against Mallinckrodt US LLC. The state alleges that the company has failed to clean up the former HoltraChem site on the Penobscot River in Orrington. The site "discharged to the environment tons of mercury and thousands of tons of mercury-contaminated brine-sludge, substances that are defined as hazardous wastes," according to the lawsuit. The facility made chemicals commonly used in the pulp and paper industry, according to DEP. It operated under various owners from 1967 to 2000. The company did not respond to a request for comment. The suit says the facility covered about 235 acres near the river, 77 of which were affected by the production. The site included five landfills, a manufacturing facility and waste piles. In the mid-1980s, the U.S. Environmental Protection Agency and the state began investigating the site and calling for remediation. According to the suit, in 2000, the Maine People's Alliance and the Natural Resources Defense Council filed a lawsuit against the company alleging that the company "discharged mercury from the site into the Penobscot River and that these discharges resulted in an imminent and substantial danger to public health and the environment." A court ordered the company to come up with a remediation plan. The latest lawsuit asks the court to remove contaminated soil and industrial sewer lines, assess civil penalties and require the company to comply with all DEP orders.
Maine DEP sues company over cleanup of contaminated Orrington site. Mallinckrodt US LLC operated a chemical manufacturing plant along the Penobscot River in Orrington that discharged up to a dozen metric tons of mercury in the late 1960s and early 1970s. Community: Posted 7:54 PM Updated at 7:54 PM The Maine Department of Environmental Protection is suing the owners of a site in Orrington, alleging they've failed to properly clean up contamination. The Maine DEP announced the legal action in Penobscot Superior Court against Mallinckrodt US LLC on Tuesday. The department is seeking injunctive relief and civil penalties. The company operated a chemical manufacturing plant along the Penobscot River in Orrington between 1967 and 1982. While under Mallinckrodt's control, the site discharged between six and 12 metric tons of mercury in the late 1960s and early 1970s, according to one court-ordered study. Please add a subscription to your account to access this story. Choose a plan to keep reading. Starter Digital $1 for 4 weeks * | 4 weeks of access for $1 * | Full access to our websites, ePapers and app * | Newsletters, archives, puzzles and games * | In-depth reporting, investigations and must-read stories * | Share access with up to four other people in your household Annual Digital $99 per year Billed annually - Save 56% * | One year of access for $99 * | Full access to our websites, ePapers and app * | In-depth reporting, investigations and must-read stories * | Share access with up to four other people in your household
Launches as Top 15 U.S. Generic Drug Manufacturer, Largest U.S. Producer of Active Pharmaceutical Ingredients and Premier U.S. Producer of Sterile Injectables...
Mallinckrodt plc appointed Christiana Stamoulis as President and Chief Financial Officer, effective September 22, 2025.