HR Generalist

The Opportunity:

LDIS LLC, A Tetra Tech company, is hiring a HR Generalist to our team based in Arvada, CO.

Why Tetra Tech:

LDIS LLC has been a leader providing engineering and design solutions for the Energy, Renewables, Water Treatment and Life Sciences markets for over 20 years. In 2019 we joined Tetra Tech, enabling us to combine our expertise with the reach and resources of a prestigious global organization.

At Tetra Tech, we are Leading with Science to solve the world’s most complex challenges. Our industry-leading experts in engineering and consulting are committed to driving positive change in communities around the world. For over 50 years, we have been at the forefront of innovation and sustainability. Today we stand as a market leader, offering cutting-edge solutions in water, environment, energy, and international development. Our work has improved more than 625 million lives around the world.

Your Impact:

Join Tetra Tech to make a real difference. Our work leverages cutting-edge technologies, advanced analytics, and the expertise of world-class scientists and engineers to create meaningful change around the world. Discover your full potential – join us to advance your career while leaving a lasting legacy.

Your Role:

The Human Resources Generalist III at LDIS LLC, a Tetra Tech Company, is a key contributor to both strategic and administrative HR functions, working closely with the corporate HR, benefits & payroll teams and leadership. This role supports a broad range of responsibilities including recruitment and onboarding, employee relations, compliance with labor laws and company policies, performance management, training coordination, benefits administration, payroll processing, and employee engagement. The position plays a critical role in fostering a positive workplace culture, maintaining accurate HR records, ensuring regulatory compliance, and contributing to special HR projects. Strong experience in HR operations, interpersonal skills, and a proactive, detail-oriented mindset are essential for success in this role

Job Responsibilities:

Recruitment & Onboarding: Lead the recruitment process by creating job postings, screening candidates, coordinating interviews, conducting reference checks, drafting offer letters and onboarding new hires to ensure a smooth integration.
Employee Relations: Serve as a point of contact for employee inquiries, help address concerns and assist with conflict resolution to foster a positive workplace environment. Supports and executes workplace investigations as needed.
HR Compliance: Ensure all HR processes and policies are aligned with local, state, and federal labor laws, as well as company policies and procedures. Assist with audits and reporting as needed (i.e. workers compensation audit).
HR Administration: Maintain and update employee records in the HRIS system, manage employee documentation, and support administrative tasks related to payroll, benefits, unemployment claims, I-9’s, personnel files and leave management.
Performance Management: Coordinate the annual performance review process. Partner with managers to provide coaching and support on performance management, including employee evaluations, goal setting, and feedback discussions.
Training & Development: Assist in organizing training programs and professional development initiatives, helping to foster skill-building and career growth for employees. Member of mentorship committee.
Benefits: Liaise with corporate benefits team to address employee questions on the benefits programs, including health insurance, 401(k) plans, ESPP and other employee perks. Assist with annual benefit enrollment communications. As needed, help resolve benefit deduction discrepancies with corporate payroll and benefits team.
Payroll Administration: Responsible for payroll change summaries to send to corporate and reconciliation payroll reports each pay period. Ensuring timely and accurate salary payments, tax withholdings, and benefits deductions. Assist with timecard management for Friday deadline from all employees ensuring all are submitted.
Employee Engagement: Support employee engagement initiatives, monthly newsletter, employee recognition programs, events, and communication strategies to promote a strong company culture.
Workplace Safety: Collaborate with the Health & Safety Manager, assist with maintaining and overseeing safety procedures for office-based employees, fostering a safe working environment.
Oversee and manage leave of absence administration, ensuring compliance with FMLA, ADA, and other applicable laws.

Lead the employee off-boarding process, including exit interviews, final documentation, and coordination with payroll and IT.
Special Projects: Support special HR projects as assigned.
Qualifications:

3-7 years of professional experience in human resources.
B.S./B.A. from an accredited university.
SHRM-CP or PHR certification or desire to obtain certification is a plus.
Thorough understanding of local, state and federal HR laws and regulations (i.e. FMLA, ADA, EEOC).
Experience with onboarding and recruiting strategy required.
Demonstrated experience in employee relations and performance management.
Experience with HRIS and applicant tracking systems (ATS) such as Taleo, is preferred.
High level of discretion and ability to handle confidential information. The ability to exercise poise, tactfulness, and diplomacy in sensitive and confidential situations.
Strong organizational skills and high attention to detail.
Ability to manage multiple tasks and prioritize effectively.
Strong interpersonal and communication skills.
Ability to adapt in a fast-paced and changing environment.
Must possess proactive, positive problem-solving skills and be an energetic, enthusiastic, collaborative team player.
Experience in applying the principles, practices, and procedures of human resource administration in the areas of recruitment and employment, compensation, and employee relations.
Proficiency in Microsoft Office (Excel, Word, PowerPoint) or similar tools.
Per our company policy, this offer is also contingent on passing a background and drug and ******* test before starting at our company.

This full-time position has the following benefits available: medical, HSA, FSA, dental, vision, Life, AD&D, STD, LTD, Critical Illness, Hospital Indemnity, Accident Insurance, EAP, Legal Services, Identity Theft and 401k.

Salary Range: $65,000 - $85,000 annually depending on level of experience, education & location.

Apply by: 7/11/25


About Tetra Tech:
Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. With 30,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science® to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition.
Tetra Tech is proud to be an Equal Opportunity Employer. All qualified candidates will be considered without regard to race, color, religion, national origin, age, disability, sex, marital and familial status, status as a protected veteran, or any other characteristic protected by law. Tetra Tech is a VEVRAA federal contractor and we request priority referral of veterans.
We invite applications from all interested parties.
Explore our open positions at https://www.tetratech.com/careers. Follow us on social media to learn more about our people, culture, and opportunities:
LinkedIn: @TetraTechCareers
X (Twitter): @TetraTechJobs

United States
Colorado
Arvada Show on map Get directions