Senior Payroll and Benefits Specialist

Allen Control Systems•Austin, TX

About The Position

Allen Control Systems (ACS) is seeking a Senior Payroll and Benefits Specialist to manage all aspects of payroll operations and benefits administration during a critical growth phase. This role serves as the subject matter expert for payroll and benefits, advising HR and Finance on strategy, optimization, and efficiency. It is a hands-on position requiring attention to detail, combining technical payroll expertise with strategic benefits administration and process improvement across multiple states and locations.

Requirements

7+ years of payroll and benefits experience, including at least 3 years in a senior or specialist role managing both functions.
Expertise in payroll tax compliance (federal, state, local) and strong benefits administration knowledge across health insurance, 401k, HSA, FSA, COBRA, and ACA.
Proficiency with modern payroll systems such as ADP, Workday, or Gusto.
Strong knowledge of multi-state payroll, particularly TX and CA.
High attention to detail, strong organizational skills, and ability to manage multiple deadlines including bi-weekly payroll cycles, quarterly tax filings, and open enrollment.
Strong communication skills and ability to explain complex payroll and benefits concepts to non-specialists.
Ability to maintain confidentiality and handle sensitive employee information with professionalism.

Nice To Haves

Payroll Compliance Specialist (PCS), Certified Payroll Professional (CPP), or Certified Employee Benefits Specialist (CEBS) certification.
Experience at a startup or high-growth company scaling from 50 to 500+ employees.
Experience with equity management, stock options, and option pool administration.
Familiarity with HRIS systems and integrated payroll, HR, and benefits system architecture.

Responsibilities

Process bi-weekly and semi-monthly payroll across multiple states with 100% accuracy and on-time delivery.
Manage all payroll deductions including taxes, health insurance, 401k, HSA, FSA, garnishments, and voluntary deductions.
Coordinate quarterly and annual tax filings (941, 940, W-2, 1099, state/local).
Own benefits strategy and operations across health insurance, 401k, HSA, FSA, life insurance, disability, and EAP.
Manage vendor relationships, open enrollment, life events, and terminations.
Reconcile benefits invoices and conduct employee benefits education including new hire orientation and open enrollment communications.
Stay current on federal, state, and local tax law changes.
Ensure compliance with ACA, COBRA, HIPAA, FLSA, and wage-and-hour regulations.
Manage payroll audit support and maintain employment eligibility (I-9) documentation.
Own payroll and benefits systems administration, managing integrations with HRIS, benefits platforms, accounting, time tracking, and equity systems.
Document processes and SOPs.
Build dashboards tracking accuracy, processing time, benefits costs, and utilization.
Respond to employee payroll and benefits questions with professionalism and accuracy.
Coordinate payroll and benefits onboarding and offboarding.
Support compensation planning and equity management.
Provide payroll and benefits reporting to Finance for accounting, budgeting, and strategic planning.