Thierry Lach

Global HR Leader | M&A Integration • Change Management • Labour Relations

Greater Paris Metropolitan Region

About

With over 20 years of experience in multicultural and complex environments, I have led HR strategy and transformation for public listed, private equity, and family-owned companies across Europe, the Middle East, and Africa. My career spans major reorganisations, M&A integrations, scale-ups, restructurings, and GDPR compliance projects, consistently delivering measurable outcomes while keeping people at the centre of change. I bring deep expertise in change management, talent & organisation development, labour relations, and HR process optimisation, with a proven ability to influence enterprise strategy and align HR with business growth. From driving global workforce planning at Worldline, to leading GDPR compliance and M&A integration at Aptiv, to steering division-level transformation at STMicroelectronics, I have consistently shaped HR as a strategic lever for performance and resilience. Key strengths: - Leading HR transformations across multi-country, multi-site operations - Building organisational resilience through crisis management and compliance - Negotiating complex labour relations and collective agreements - Designing and deploying talent management frameworks aligned with business strategy - Driving enterprise-wide HRIS implementations and process optimisation Languages: French (native), English (fluent C2), German (basic B1) Certifications: PROSCI (Change Management), MBTI, OPQ32, SHRM-SCP HRIS Expertise: Workday, SAP HR, SAP SuccessFactors, Taleo-Oracle, Peoplesoft, ADP, Power BI

Experience

  • General Purpose and Automotive Microcontroller Division Global HR Manager at STMicroelectronics
    Jan 2025 - Present · 1 yr 6 mos

    Lead HR for 1,700 FTEs across 27 sites in 15 countries. Directed merger of two product lines into a unified division.

  • Aptiv (Permanent · 5 yrs 4 mos)
    • HR Director France & Belgium + HR Manager EU Sales
      Feb 2022 - Dec 2024 · 2 yrs 11 mos

      Oversaw 1,100 FTEs, managed team of 16. Negotiated collective agreements, coordinated COVID-19 crisis response. Reengineered talent management processes across Europe.

    • HR Country Lead for France
      Jul 2021 - Jan 2022 · 7 mos

    • Human Resources Manager France & Belgium for AS&UX and EDS
      Sep 2019 - Jun 2021 · 1 yr 10 mos

      Main achievements: - 2019: merger of two legal entities with creation of a CSE Central, - 2020: managed TLO, reorganisation (organisational design and job structure) of a Business Line - 2021: managed a restructure and managed an acquisition, - 2022: reorganisation (organisational design and job structure) of a business line and 2 collective dismissals, - 2023: change of national bargaining agreement (renegotiation of collective agreement, health insurance, job structure, employee representation…),

  • Global Workforce Manager at Worldline Global
    Nov 2018 - Sep 2019 · 11 mos

    - Manage and conduct Workforce Planning & Analytics, Contingent Workforce Strategy and Operations for the Merchant Service Business Line to ensure workforce supply will be able to meet the demands and challenges of the organization’s mission, goals, and objectives, - PMO for two transformation programs within the company and interface for Merchant Services PBU following the acquisition of Six Payment Services,

  • International Human Resources Manager at Ayming
    Jul 2016 - Nov 2018 · 2 yrs 5 mos

    HR Director for 11 countries (370 employees – 38 million euros): Canada, USA, United Kingdom, Belgium, Netherlands, Germany, Poland, Czech Republic, Slovakia, Hungary and Japan - In charge of all local HR process and policies in the countries, - Identify and develop regional HR initiatives aligned with the overall company, business and HR strategy, - Member of the committee in charge of reviewing HR Policies at Group level (job architecture, reward, international mobility...), - Provide consultative and strategic advice on people and organizational issues to business leaders and regional leadership teams to maximize business, country and HR outcomes - Roll-out of the change management program “New Life” at international level,

  • Single Buoy Moorings (Permanent · 3 yrs 5 mos)
    • HR Manager
      Jan 2015 - Sep 2015 · 9 mos

      SBM Offshore is the worldwide leader in floating production and mooring systems, in production operations and in terminals and services. The company has a turnover of USD 3.7 billion and 10,000 employees worldwide. In charge of all HR activities for the Project Execution population of the Monaco Regional Centre (870 employees) - Roll-out and delivery of the different HR Processes in support of Line Managers: performance review, talent review, salary review… - Definition of the Training Policies in line with Business Plan and Performance Improvement Plan, - Compensation & Benefits: management of the payroll, short-term incentives, long term incentives… - Management of the Disciplinary Actions, - Management of International Mobility: expatriation/impatriation, liaising with host HRs, International Mobility Specialists, control of the continuity of social benefits…, - Industrial Relations: Roll-out of a Social Plan: consultations with Personnel Delegates on Job Categories, impacted positions, proposed redundancy package under the voluntary departure scheme. Internal repositioning of impacted employees - In charge of the HR coordination on the “Cidade de Marica & Cidade de Saquarema” Project (2 double hulls FPSOs to deliver in 26 months, cost USD 3.4 billion, 3 regional centres and activities in 5 countries),

    • HR Business Partner
      Sep 2012 - Dec 2014 · 2 yrs 4 mos

      HR Business Partner for Programme Management, Construction, SCM functions

    • Recruitment Manager
      May 2012 - Aug 2012 · 4 mos