Security Manager

Why Join Us Join Marathon’s Galveston Bay Refinery and play a critical leadership role in protecting people, operations, and assets. This position offers a seasoned leader the opportunity to shape security strategy at one of the nation’s key energy facilities and make a visible difference in a dynamic industrial environment. This role offers meaningful responsibility, leadership growth, and the chance to help safeguard essential operations. Position Summary The Marathon Galveston Bay Refinery (GBR) has an opening for a Security Manager to lead the Security Department. The individual will be responsible for supervising union, salaried, and contract security personnel, overseeing site-wide security programs and plans, regulatory compliance, investigative activities, and workplace violence prevention policies. The role will support and ensure the protection of refinery operations through the development, implementation, and monitoring of security strategies, risk assessments, and response plans, ensuring compliance with applicable federal, state, and industry regulations. Key Responsibilities Establish security and protection strategies, priorities, and critical tasks including procedures, training, equipment, visitor and access controls, contractor vetting, security and emergency communications and information sharing. Continuously monitor effectiveness of security plans and operations for improvements. Oversee policies, including workplace violence prevention policies, standards, guidelines and procedures engaging business unit management to ensure concerns are adequately addressed. Direct training programs to maintain compliance with U.S. Federal and state regulations and company standards. Gather and assess information related to potential security threats and develop appropriate preventive strategies within area of assignment. Lead investigative teams, conduct complex Code of Conduct investigations, and prepare for legal proceedings to which the company may be a party. Lead ongoing risk assessments, criminal investigations, and on‑site audits to identify exposures, threats and vulnerabilities. Identify likelihood and consequence of such events. Formulate and institute risk mitigation measures ensuring compliance with governmental regulations for petroleum, maritime, and transportation industries. Coordinate efforts with internal and external resources to ensure restoration of critical systems and the proper support to all parties in the event of a security‑related event. Serve as a recognized expert in the security regulatory compliance programs within area of assignment and coordinate with local law enforcement. Manage site drone resources in support of security and refinery needs. Education and Experience Minimum Education and Experience Undergraduate degree in criminal justice, law enforcement, security, or related discipline is required. Ten (10) or more years of law enforcement, military, or security‑related field experience is required. A valid driver’s license is required. Preferred Requirements Detailed knowledge and experience implementing the NIMS Incident Command System (able to train/fill/advise multiple positions) preferred. Location Texas City, Texas Equal Opportunity Employer Marathon Petroleum Company LP is an Equal Opportunity Employer and gives consideration for employment to qualified applicants without discrimination on the basis of race, color, religion, creed, sex, gender (including pregnancy, childbirth, breastfeeding or related medical conditions), sexual orientation, gender identity, gender expression, reproductive health decision‑making, age, mental or physical disability, medical condition or AIDS/HIV status, ancestry, national origin, genetic information, military, veteran status, marital status, citizenship or any other status protected by applicable federal, state, or local laws. If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at View email address on click.appcast.io. Marathon Petroleum offers a total rewards program which includes, but is not limited to, access to health, vision, and dental insurance, paid time off, 401k matching program, paid parental leave, and educational reimbursement. Detailed benefit information is available at The hired candidate will also be eligible for a discretionary company‑sponsored annual bonus program. Veteran / Disability Equal Opportunity We will consider all qualified applicants for employment, including those with arrest or conviction records, in a manner consistent with the requirements of applicable state and local laws. In reviewing criminal history in connection with a conditional offer of employment, Marathon will consider the key responsibilities of the role. #J-18808-Ljbffr