WOG Technologies
Website:
woggroup.com
Job details:
Job Description — Senior Mechanical Engineer (Design & Engineering)
Organization: W.O.G. Technologies Limited Department: Design & Engineering — Mechanical Position: Senior Mechanical Engineer Location: Gurugram (Corporate HO), with travel and deputation to project sites across India and overseas as required Reports to: Head / Lead – Mechanical Engineering Vacancies: 1 Employment Type: Full-time
About W.O.G. Technologies Limited
Visit us at www.woggroup.com
Role Purpose
The Senior Mechanical Engineer is a senior individual contributor in W.O.G.'s Design & Engineering team, responsible for the mechanical design, engineering, procurement support, and site execution oversight of water and wastewater treatment plants. The role spans the full project lifecycle — from detailed mechanical engineering (equipment sizing, piping design, GA/layout development, vendor data review) through procurement, fabrication supervision, installation, testing, and commissioning.
The incumbent will be the mechanical engineering owner for assigned projects — ETPs, STPs, WTPs, ZLD plants, SWRO desalination, MEE/MVR systems, and biogas/sludge handling facilities — and will work cross-functionally with Process, Civil, Electrical, I&C, Procurement, and Project Management teams.
Key Responsibilities
A. Mechanical Design & Detailed Engineering (~35%)
- Develop mechanical design deliverables based on Process inputs (PFDs, P&IDs, Process Design Basis): equipment GA drawings, plant layouts, piping GA, isometric drawings, support arrangements, and equipment foundation load data.
- Perform equipment sizing, selection, and rating calculations for:
- Rotating equipment: centrifugal & PD pumps, dosing pumps, screw pumps, submersible pumps, air blowers (rotary lobe, multistage centrifugal, twin-screw), compressors, agitators/mixers, decanters, centrifuges, screw presses, belt presses, screens (bar, mechanical, fine, drum), grit removal systems
- Static equipment: pressure vessels (MGF, ACF, softener, RO skids, deaerators), atmospheric tanks (MS, MSRL, FRP, SS304/316, HDPE), clarifiers, DAF/CPI/TPI units, tube settlers, lamella separators
- Membrane systems: UF/MF/NF/RO skids, membrane housings, CIP systems
- Thermal/evaporation systems: MEE, MVR, ATFD, falling-film & forced-circulation evaporators, crystallisers, condensers, heat exchangers (shell & tube, plate)
- Sludge handling: thickeners, digesters, sludge dewatering equipment
- Biogas systems: gas holders, blowers, scrubbers, flare stacks, dewatering units
- Carry out pump hydraulic calculations: NPSH available vs. required, suction & discharge head, power consumption, motor sizing, pump curve selection, and parallel/series operation analysis.
- Carry out blower sizing calculations: oxygen demand to airflow conversion, pressure drop computation across diffusers and headers, blower selection (PD vs. centrifugal), and turndown evaluation.
- Perform piping hydraulic calculations & line sizing: pressure drop, velocity, water hammer/surge analysis, expansion loop design, pipe support spacing.
- Prepare piping material specifications, valve datasheets, and instrument tap-off schedules in coordination with Process & I&C teams.
- Develop 3D plant models / layouts using AutoCAD Plant 3D, Bentley OpenPlant, AVEVA E3D / PDMS, or SolidWorks where applicable; review clash detection and constructability.
- Apply applicable codes and standards: ASME B31.1 / B31.3 (piping), ASME Section VIII Div 1 (pressure vessels), API 610 / 674 / 675 (pumps), API 650 / 620 (storage tanks), IS 803 / IS 875 / IS 2825 (Indian codes for vessels & tanks), HEI / TEMA (heat exchangers), and client-specific specifications.
B. Procurement & Vendor Engineering Support (~20%)
- Prepare Material Requisitions (MRs), Technical Data Sheets (TDS), and Vendor Specifications for mechanical equipment and bulk piping.
- Float technical RFQs to approved vendors (Kirloskar, KSB, Grundfos, Wilo, Sulzer, Aerzen, Atlas Copco, Howden, Thermax, GEA, Alfa Laval, Andritz, Flowserve, Pentair, Xylem, etc.).
- Carry out technical bid evaluation (TBE): compare vendor offers on hydraulic performance, materials of construction (MOC), energy efficiency, spares, warranty, and delivery; prepare recommendation notes.
- Review and approve vendor drawings and documents: GA drawings, foundation loading, performance curves, datasheets, QAP, ITP, IBR/PESO certifications (where applicable), and as-built documents.
- Coordinate with Procurement on expediting, kickoff meetings, pre-inspection meetings, and Factory Acceptance Tests (FATs).
- Conduct or witness FATs and shop inspections at vendor premises for critical equipment (pumps, blowers, RO skids, evaporators, packaged plants).
C. Site Execution, Installation & Commissioning Oversight (~30%)
- Supervise and monitor mechanical installation, fabrication, and erection activities at project sites — pump houses, aeration tanks, MBR/MBBR/UASB systems, clarifier mechanisms, RO/UF skids, evaporator islands, sludge handling buildings, biogas plants, and chemical dosing skids.
- Review GFC drawings, P&IDs, isometrics, and equipment GAs with site teams to ensure execution aligns with design intent.
- Oversee the installation of pumps, blowers, compressors, piping systems, valves, instruments, agitators, screens, and dewatering equipment.
- Coordinate with Civil (foundations, plinths, anchor bolts, embedments, sump pits), Electrical (cable trays, MCC, drive interlocks), I&C (transmitter mounting, sample tap-offs, analyser panels), and HVAC teams.
- Manage Site Acceptance Tests (SATs), hydrotest, pneumatic test, alignment (laser/dial gauge), no-load and load trials, performance guarantee tests, and start-up of mechanical systems.
- Drive Pre-Commissioning, Commissioning, and Performance Guarantee (PG) runs in coordination with Process & O&M teams.
- Supervise EPC sub-contractors and erection vendors; ensure workmanship, quality, productivity, and timeline compliance.
- Drive HSE (Health, Safety & Environment) compliance at site — work permits, lifting plans, confined-space entry, working-at-height permits, hot-work permits — and ensure zero-LTI culture.
- Maintain daily progress reports (DPRs), equipment logs, punch lists, non-conformance reports (NCRs), and as-built records.
D. Engineering Documentation & Cross-Functional Coordination (~10%)
- Prepare and review Bills of Quantities (BOQs) for mechanical scope (equipment, piping, fittings, valves, supports, insulation).
- Maintain the mechanical equipment list, line list, valve list, and tie-in schedule for each project.
- Issue engineering change notes (ECNs) and field change requests, and track design closure.
- Participate in HAZOP, SIL, design reviews, model reviews (30%-60%-90%), and constructability reviews.
- Support handover to O&M team with as-built drawings, OEM manuals, spare parts lists, and PM schedules.
E. Quality, Standards & Continuous Improvement (~5%)
- Ensure all mechanical deliverables comply with ISO 9001 QMS, project Quality Plan (QP), and client specifications.
- Maintain discipline-level standards: piping classes, valve schedules, MOC selection guidelines, and approved vendor lists.
- Capture lessons learned from completed projects and contribute to the engineering knowledge base — standard sizing sheets, design templates, vendor performance scorecards.
- Stay current on emerging mechanical technologies: variable frequency drives (VFDs) for pumps/blowers, energy recovery devices (ERDs) for SWRO, magnetic-bearing blowers, AI-based predictive maintenance, and high-efficiency aeration systems (membrane diffusers, MABR).
Qualifications & Experience
Education
- B.E. / B.Tech in Mechanical Engineering — mandatory
- Diploma in Mechanical Engineering candidates considered only with 15+ years of demonstrably strong site & design exposure
- M.Tech in Mechanical / Thermal / Design Engineering — preferred
- PMP / Lean Six Sigma / NEBOSH-IGC certifications — preferred
Experience
- Minimum 10 years of mechanical engineering experience, with at least 6 years in water/wastewater/desalination/effluent treatment projects.
- Hands-on exposure to at least three of the following: ETP, STP, WTP, ZLD, SWRO/BWRO, MEE/MVR, biogas, sludge handling, or industrial process water.
- Demonstrated end-to-end project ownership — from detailed engineering through procurement support, installation, and commissioning of at least 4–6 mid-to-large projects (≥₹20 Cr mechanical scope each).
- Prior experience in EPC, turnkey, BOOT/BOO, or system-integrator setups — strongly preferred.
- Experience handling international projects (Middle East, SE Asia, Africa, Caribbean) — an advantage.
- Exposure to clients in any of W.O.G.'s focus sectors: chemicals & fertilizers, refineries, pharma, food & beverage, textile, distillery, dairy, pulp & paper, power, mining, automotive, or municipalities.
Technical Knowledge
- Strong command of rotating and static equipment: pumps, blowers, compressors, mixers, vessels, tanks, heat exchangers, evaporators.
- Strong knowledge of piping engineering: line sizing, material selection (CS, SS304/316/316L, duplex, FRP, HDPE, PP, CPVC, MSRL/MSEP), valve selection (gate, globe, ball, butterfly, check, knife-edge, diaphragm, plug, control), expansion management, pipe supports.
- Working knowledge of stress analysis (CAESAR II / AutoPIPE) for critical piping — preferred.
- Familiarity with welding & fabrication standards (ASME Section IX, AWS D1.1), NDT (RT, UT, PT, MT), and inspection practices.
- Understanding of mechanical seal selection, lubrication, vibration analysis, and condition monitoring.
- Working knowledge of HAZOP, SIL, LOPA, and HAZID methodologies.
Software & Tools
Must-have:
- AutoCAD 2D — proficient
- MS Office — advanced Excel for sizing calculations, equipment lists, BOQs; PowerPoint for client/internal decks; MS Project for schedules
- Pump/blower sizing tools (Grundfos WinCAPS, KSB Easy Select, Wilo Select, Aerzen ATEMOS, or equivalent)
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