Senior Casualty Treaty Reinsurance Underwriter

As a Senior Casualty Treaty Reinsurance Underwriter you will work closely with key internal and external stakeholders, including cedents, brokers, and actuarial teams, to develop tailored reinsurance solutions. You will also play a critical role in market development, risk management, and portfolio optimization.

Your Impact:

• Evaluate and underwrite new and renewal casualty reinsurance treaties, assessing risk exposures, pricing, and terms.
• Develop and implement underwriting standards and best practices to maintain portfolio profitability.
• Manage a portfolio of casualty reinsurance treaties, ensuring alignment with profitability and growth objectives.
• Conduct in-depth portfolio analysis to identify opportunities for optimization and diversification.
• Assess and manage treaty-related risks, developing and executing effective risk mitigation strategies.
• Ensure compliance with company policies, regulatory requirements, and underwriting best practices.

Successful Candidates Will Have:

• Bachelor’s degree in business, finance, actuarial science, or a related field.
• Extensive experience (15+ years preferred) in casualty and workers’ compensation reinsurance underwriting.
• In-depth knowledge of casualty insurance products and underwriting principles.
• Exceptional negotiation and communication skills to build and maintain relationships with key stakeholders.

The total compensation for a position may also include other elements dependent on the position offered. The expected annual pay range for this position is between $200,000 to $300,000 plus discretionary bonus. The actual base pay offered may vary depending on multiple individualized factors, including geographical location, education, job-related knowledge, skills, and experience.

One80 Intermediaries is a privately held firm with offices throughout the US and Canada.  As a leading insurance wholesaler and program manager, One80 offers placement services and binding authority for property and casualty, life, travel/accident and health, affinity and administrative services, and warranty business.  Launched just four years ago, One80 Intermediaries has grown to be one of the largest intermediaries in the United States. In 2024, One80 Intermediaries was ranked the 14th largest broker in the U.S. by Business Insurance. In 2025, One80 Intermediaries earned the Great Place To Work® Certification™ for the second consecutive year.

If you have any questions about this posting, please contact one80careers@one80.com

Pay Range:

$200,000 - $300,000 Annual

The pay range provided above is made in good faith and based on our lowest and highest annual salary or hourly rate paid for the role and takes into account years of experience required, geography, and/or budget for this role.

One80 Intermediaries is an equal opportunity workplace and is committed to ensuring equal employment opportunity without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics.

Learn more about working at One80 Intermediaries by visiting our careers page: www.one80.com/careers.

Personal information submitted by California applicants in response to a job posting is subject to One80's  California Job Applicant Privacy Notice .

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Brown & Brown does not accept unsolicited resumes from external recruiters, recruitment vendors or employment agencies (“Recruiting Vendors”). Recruiting Vendors must have a valid written agreement and receive prior written authorization from an authorized Brown & Brown representative before submitting candidates for any publicly posted role.  Any unsolicited resumes submitted to Brown & Brown or its employees become the property of Brown & Brown, and no fees will be paid for such submissions.  Additional information regarding this policy can be found on our careers page.