About Us

John Power Engineering was founded by John Kalowa. A well-trained engineer with extensive knowledge and experience in the industry both locally and regionally . He is the visionary behind the excellency and exceptional leadership in the company. 

About John Kalowa


John underwent a rigorous 4 years apprenticeship training in Fitting and Turning including machining. He received training at Cochrane Engineering Zimbabwe ( the sole John Thompson licensed fire tube boilers manufacturer in Southern Africa) and holds a National Craft Certificate in Machine Shop practices and a National Intermediate Technician Certificate in Mechanical Engineering (Plant Option).

Between 2010 and 2012 John attended Harare Institute of Technology under the IME (Industrial and Manufacturing Engineering) Bachelor of Technology degree program up to part 2:1 and had to defer the program due to financial constraints. From 2012- to the present: John has, on annual basis, been called up to supervise shutdowns and breakdowns of Sulphuric Acid Manufacturing Plant No. 1 and lately No. 2 at Tebala site at Tenge Fungurume Mine in Katanga region of the DRC. It is this immense trust and confidence in this guy bestowed upon him by companies within Zimbabwe and afar that has bubbled into the confidence upon which John Power Engineering has found its roots. He is poised to share his wealth of experience with any organisation anywhere in the world. For as long as it is an acid plant or mining equipment problem there is nothing too big nor too small, everything  is possible.

Exposure and Experience

Precision machining and turning using both conventional and CNC machines. Involved from marking out  to fabrication and construction to installation, running and after sales maintenance and repairs of John Thompson licenced fire tube boilers. From 1988 to 1994.

John was with ZimPhos (Zimbabwe Phosphate Industries) from 1994 to 2011. ZimPhos is Zimbabwe’s sole manufacture of single and triple superphosphates, 98% industrial and pure sulphuric acid, aluminium sulphate and phosphoric acid.

For over 16 years John worked in the maintenance and repairs department of sulphuric and phosphoric acid manufacturing plants, superphosphates and aluminium sulphate manufacturing plants. John rose from a plant fitter through various posts up to Plant Mechanical Superintendant. He has been in the thick of things in the execution of annual statutory shutdowns and maintenance of these plants, stripping them to the core, rebuilding and firing them up back on line. He is a tried and tested cadre and effective team player in the sound diagnostics, maintenance and repairs of all the above named plants.

John has simultaneously been running mining equipment maintenance and repairs teams all over Zimbabwe covering Zimplats Mines, Unkie Mine, Mimosa  Mine, Hippo Valley and Triangle, Bindura Nickel Mine and Freda Rebecca. He has been involved in in situ line boring activities, refurbishment of hydraulic cylinders, general metal and fibre glass fabrication and cost effective wear management systems.




John’s foreword of advice is that should your organisation need any of the services mentioned in this introduction your search is over. Look no further than John Power Engineering for that best and satisfying service or your money back. This is a company with the finest picked up artisans forming a formidable team that you wouldn’t want to miss at any of your maintenance and repairs routines.

Rongai Makwavarara - Projects and Operations Engineer


Rongai Makwavarara brings with him to John Power Engineering a wealth of and unparalleled experience. An accomplished and highly respected Senior Process Engineer with a progressive and accelerated career trajectory working for multinational organisations across Africa and the Middle East within sulphuric acid and super phosphates manufacturing plants, the Oil and Gas, Chemicals, Power Generation and Construction Projects sectors throughout the last 20 years

Highly motivated, and committed to demonstrating value in leading projects from concept stage to the completion and close out stage; equally at ease working in a standalone role as working alongside a large operations teams

A highly credible and technically qualified Process lead; one who thinks strategically, yet always acts commercially, balanced with strong stakeholder management skills, innovative problem solving credentials, the ability to execute against demanding Quality & HSE standards, and a commitment to the delivery of the organisations strategic and commercial objectives.

Exposure and Experience

Rongai’s major role is that of contracts and projects negotiations, their management, evaluation and closure coupled with giving sound technical guidance and plants processes support to engineering teams on and off sites.

Before joining John Power Engineering, Rongai was with Saudi Aramco from 2013 to 2017 as a Project Engineer. In his entire duration here he was stationed at various stations that included Jizan Refinery and Marine Terminal’s Utilities Division, crude oil division and Tank Farm Division.  Here he was assigned to the Project Management Team with multi billion dollar scope to provide an enhanced capacity to resolve a severe schedule delay on the inside Battery Limits Utilities Plant.

He was, whilst in the crude division, appointed to the Project Management Team responsible for providing coverage for ADU and VDU partial areas to monitor EPC Contractors delivery of Project Scope on schedule and within budget, whilst meeting quality, safety and environmental standards.

In the Farm Tanjs Division he was tasked with providing Technical support to the Project Management Team and EPC Contractors specifically accountable for the Process Discipline Review stage for the £1Bn Tank Farm Package and acted as the key team interface between other Departments across the organisation.

His experience at Aramco also included working in the WASIT GAS PROGRAMME (SULPHUR RECOVERY UNIT AND UTILITIES DIVISION) where he was charged with delivering Technical support to the Project Management Team and EPC contractors ensuring, Safety, Health and Environmental Quality for The Wasit Project, which was in its Construction Execution Phase.

  • From 2012 to 2013 Rongai was an Engineering Manager at Vitherm, in Johannesburg, South Africa. 

    He was appointed to lead an Engineering team in the Design and Fabrication of Heat Exchangers for clients in Chemicals, Gas and Oil, Energy, HVAC and Marine sectors whilst Reporting to the Company President for Africa.

  • Rongai worked for a total of 8 years at Zimbabwe Phosphate Industries ( ZimPhos) in Msasa, Harare, Zimbabwe from January 1998 to February 2006. He rose through the ranks from a Process trainee right up to Process Engineer. His major role at ZimPhos was, whilst reporting directly to the Production Manager, charged with leadership of an Operations Teamof 200 employees responsible for achieving a £100M production target for fertilizer and chemicals production whilst meeting Safety, Health, Environmental and Quality standards. He was premised in the sulphuric acid production plant.



Malaviya National Institute of Technology

Degree Name: Bachelor of Engineering honours

Field Of Study: Chemical Engineering

Dates attended: 1992 – 1996

Licenses & Certifications

  • B.Eng.; MNIT formerly MREC; Jaipur, Rajasthan, India
  • IChemE Member
  • Management Development (Zimbabwe Institute of Management)
  • PMP (Project Management Professional)
  • Pr.Eng Engineering Council South Africa (ECSA)
  • Prince2 Project Management Practitioner
  • South African Institute of Chemical Engineers (SAIChe) – Member
  • Zimbabwe Institute of Engineers (ZIE) – Member


Mission Statement

To produce and provide innovative solutions and timeously deliver quality service  to every client’s satisfaction.

Our Company Vision

We thrive to be the most sought after and leading global acid plants, new technology driven and general engineering  services provider.