HR Manager (Manufacturing)

Sumitomo Electric Group
San Marcos, CA

Description

Position at Sumitomo Electric Interconnect Products, Inc.

Sumitomo Electric Interconnect Products, Inc. (SEIP) is seeking an HR Manager. The HR Manager leads and manages human resources operations for the manufacturing site in San Marcos, CA. This role partners with leadership and employees to support employee relations, recruiting, compliance, training, and organizational effectiveness while ensuring alignment with company policies, employment laws, and corporate HR standards. The position reports to the President.

Job Duties and Responsibilities

Serve as the primary HR leader and business partner for the manufacturing site

Provide day-to-day HR guidance and support to managers and employees on employee relations, performance management, discipline, coaching, and conflict resolution

Lead or oversee employee investigations and ensure fair, consistent, and compliant outcomes

Manage full-cycle recruiting for exempt and non-exempt roles, including workforce planning, interviewing, offers, onboarding, and new employee orientation

Oversee HR processes related to employee lifecycle changes such as promotions, transfers, leave of absence, and terminations

Ensure compliance with federal, state (California), and local employment laws, including wage and hour, leave laws, discrimination, and workplace practices

Serve as site compliance resource and represent HR in interactions related to employee claims, audits, or employment-related agency matters, as needed

Partner with leadership on talent development, succession planning, training, and employee engagement initiatives

Coordinate and oversee compliance and required training programs, including safety, harassment prevention, and corporate-required training

Support workers’ compensation and workplace injury management in partnership with safety, finance, and external vendors

Maintain accurate employee records, HR documentation, and organizational charts

Collaborate with payroll providers and finance to ensure accurate employee data; payroll processing is not performed in this role

Utilize HR systems and reporting tools; familiarity with ADP Vantage is a plus

Support updates and communication related to HR policies, procedures, and the employee handbook

Manage multiple priorities effectively in a fast-paced manufacturing environment while maintaining confidentiality and attention to detail

Participate in cross-functional and corporate HR initiatives and special projects as assigned

Qualifications

Bachelor’s degree in Human Resources, Business Administration, or a related field, or equivalent combination of education and experience

10+ years of progressive HR experience, preferably in a manufacturing environment

Strong background in employee relations, recruiting, and compliance

Working knowledge of California employment laws and HR best practices

Experience supporting training, employee development, and workplace safety initiatives

Familiarity with HRIS systems; ADP Vantage experience is a plus

Strong written and verbal communication skills with the ability to work effectively at all levels of the organization

Proven ability to manage competing priorities and meet deadlines

High level of professionalism, discretion, and integrity

The base salary range for this position is $120,000 to $130,000 annually.​

Compensation may vary depending on a number of factors, including a candidate’s experience, qualifications, skills, competencies and location. Base pay is one part of the total compensation and benefits package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives.​

About Sumitomo Electric Interconnect Products, Inc.

Sumitomo Electric Interconnect Products, Inc. (SEIP) was founded in 1985 as sales and marketing company. The company was originally formed to sell products made by Sumitomo Electric Industries, Ltd. In Japan to North American customers. SEIP is an independent U.S. company and is a wholly owned subsidiary of Sumitomo Electric Fine Polymer (SFP). In 1996, SEIP began US production by building a new manufacturing site in San Marcos, CA. SEIP produces, markets, and sells products based upon heat-shrinkable plastics technology. We supply products to a diverse range of customers in a variety of industries. These include automotive, aerospace, appliance, communications, electronics, medical, and transit industries to name a few.

To learn more, about SEIP, please visit https://www.seipusa.com.

About Sumitomo Electric Group


Sumitomo Electric Industries, Ltd. is a recognized global technology leader with over 280,000 employees working at around 400 group companies in 40 countries. Building on more than 120 years of innovation, today Sumitomo Electric is engaged in diversified business activities that support people’s daily lives and industries in five business segments: automotive, infocommunications, electronics, environment & energy, and industrial materials. To learn more about Sumitomo Electric, please visit https://sumitomoelectric.com and our YouTube Channel (https://www.youtube.com/user/SumitomoElectric/). Follow us on LinkedIn (https://www.linkedin.com/company/sumitomo-electric).

(https://www.linkedin.com/company/sumitomo-electric).

Posted 2026-04-24

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