[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Gallagher jobs](https://jobs.opennash.com/companies/gallagher/) · [Search jobs](/search/) Gallagher · London, United Kingdom # Senior Development Underwriter/Manager - Construction & Casualty London, United Kingdom Full-time Manager or lead Manufacturing & Production Listed on Gallagher’s official careers site. Posted September 29, 2026. Check that it is still open and apply there. [Apply on Gallagher’s careers site →](https://ukjobs-ajg.icims.com/jobs/56592/login) [OpenNash Jobs](https://jobs.opennash.com/) / [Gallagher](https://jobs.opennash.com/companies/gallagher/) / Senior Development Underwriter/Manager - Construction & Casualty ## Job description Introduction At Pen, we don’t just underwrite risk, we unlock possibility. We’re a dynamic underwriting and distribution business backed by the strength of Gallagher and powered by a belief that every challenge has a solution. With entrepreneurial energy, niche expertise, and a bold growth mindset, we’re transforming what it means to be an MGA in today’s insurance landscape. Whether you’re shaping new products, solving complex problems, or collaborating across teams, your ideas and initiative will help deliver smarter solutions for our clients—and move the industry forward. Here, agility meets stability. Creativity meets execution. And your career meets real opportunity. At Pen, we champion innovation, value accountability, and thrive on building something better together. If you’re looking to join a team that’s rewriting the future of underwriting, we’d love to hear from you. ### Overview At Pen Underwriting, part of Gallagher, we’re shaping the future of insurance. We’re looking for a Senior Development Underwriter/Manager to join our Construction & Casualty team. Based in the UK, this role focuses on building broker relationships, developing new business, and managing facilities. You’ll have the chance to lead, innovate, and make a real impact in a collaborative and supportive environment. How you'll make an impact You’ll lead the charge in developing and delivering our new business plan. By building strong broker relationships, you’ll identify and convert profitable opportunities. You’ll also negotiate and manage facilities, ensuring they align with underwriting discipline and insurer appetite. Acting as a senior market-facing representative, you’ll promote Pen’s Construction & Casualty proposition. Additionally, you’ll underwrite complex risks, provide technical guidance to colleagues, and mentor the team to achieve shared goals. ### About You Here’s what you’ll bring to the role: Experience in underwriting Construction and Casualty risks, including complex cases. A proven track record of developing and converting new business through broker relationships. Strong negotiation and relationship-building skills. Knowledge of delegated facilities and portfolio management. Commercial awareness and sound judgement in underwriting decisions. Leadership skills, with experience mentoring and coaching colleagues. IT proficiency and a commitment to personal development. CII/Dip CII qualification or progress towards it. Compensation and benefits At Gallagher, we believe supporting our colleagues goes far beyond the role itself. For more information, visit our Benefits page. Competitive compensation Comprehensive benefits programs designed to support your well-being Career development opportunities and ongoing learning A collaborative, people-first culture with accessible leadership The opportunity to do meaningful work with global reach and local impact At Gallagher, we are dedicated to building an inclusive and authentic workplace. If your past experience doesn’t align perfectly, we encourage you to join our Talent Community to stay connected to additional career opportunities. Although this role is listed as full-time, if you’re in a job-share partnership, work reduced hours, or have any other flexible arrangement, please still get in touch. We will also offer reasonable adjustments to the recruitment process if required, so please let us know. Gallagher is an affirmative action/equal opportunity employer (Minorities/Females/Veterans/Disabled) ## At a glance - Posted by the employer: Sep 29, 2026 - First seen by OpenNash: Oct 18, 2026 - Last checked: Oct 18, 2026 - Listed for: 19 days - Location: London, United Kingdom - Employment type: Full-time[Apply on Gallagher’s careers site →](https://ukjobs-ajg.icims.com/jobs/56592/login) ## More jobs at Gallagher ### [Account Handler](https://jobs.opennash.com/companies/gallagher/jobs/8dc1bb32505480c89f93/) London, United Kingdom ### [Claims Broker - Aerospace General Aviation](https://jobs.opennash.com/companies/gallagher/jobs/5a5c79d73f43b11246d7/) London, United Kingdom ### [Senior Catastrophe Modeller](https://jobs.opennash.com/companies/gallagher/jobs/b922cd4b0891d068fbda/) London, United Kingdom ### [UK Technical Underwriting Manager Risk Managed](https://jobs.opennash.com/companies/gallagher/jobs/4c848ba062625d99ece0/) London, United Kingdom ### [Account Director](https://jobs.opennash.com/companies/gallagher/jobs/328367964f4a12721318/) London, United Kingdom ## Similar jobs at other companies ### [Development Underwriter - Property & Casualty](https://jobs.opennash.com/companies/travelers/jobs/d70baf4f18aa084f1448/) Travelers · SRY - Redhill ### [Casualty Underwriter](https://jobs.opennash.com/companies/chubb/jobs/eee4b13b22e349b23eb5/) Chubb · Malaysia ### [Conducteur / ingénieur travaux F/H Meylan Meylan DEVELOPMENT / CONSTRUCTION / PROJECT MANAGEMENT DEVELOPMENT / CONSTRUCTION / PROJECT MANAGEMENT Permanent](https://jobs.opennash.com/companies/vinci/jobs/60e02b994e99ff69e1f8/) VINCI · Meylan ### [Duurzaamheidscoördinator Almelo, Overijssel Almelo, Overijssel DEVELOPMENT / CONSTRUCTION / PROJECT MANAGEMENT DEVELOPMENT / CONSTRUCTION / PROJECT MANAGEMENT Permanent](https://jobs.opennash.com/companies/vinci/jobs/42ed6eb6a30512147b0e/) VINCI · Almelo, Overijssel ### [Senior Underwriter - General Casualty](https://jobs.opennash.com/companies/w-r-berkley/jobs/03464807d557236a43c8/) W. 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