About SEM Solutions
We provide high quality, well-engineered, turnkey energy and water solutions to the commercial and industrial building sectors.
With in-house engineers, technicians and advanced recording instruments and equipment, SEM Solutions is able to offer complete design and supply packages for utility management projects across the country.
Coupling our experience with advanced simulation software, we are able to guarantee the performance of our plants.
Our focus is on quality and value for money.
Our EXPERIENCE
Together with our founding company, Spoormaker & Partners, we have over 1,000 years of combined experience and more than 40 Professionally Registered Personnel.

Energy Generation
Water Supply & Recovery
Consulting Services
Est 1997
> 400 Combined Yrs of Experience
> 250 Successful Projects

Electrical & Electronical
Wet & Fire Services
Mechanical (HVAC & Medical Gas)
Est 1964
> 900 Combined Yrs of Experience
35 PMR Diamond Arrow Awards
Our TEAM
Hannes Pretorius
Managing Director
Pr Eng | MBA | B Eng Mech
Hannes Pretorius
Hannes Pretorius is the Managing Director of SEM Solutions and Director at Spoormaker & Partners. He is a registered Professional Mechanical Engineer with the Engineering Council of South Africa (ECSA) and holds a Master of Business Administration degree.
With his combined history in both the contracting and consulting industries, Hannes has diverse experience in engineering and managing projects in the built environment. Projects under his belt range from Commercial Buildings, Retail Centres and Residential Developments, to Data Centres, Healthcare Institutes and Industrial Facilities.
When he isn’t working, Hannes loves spending time with his family, always on the lookout for another outdoor adventure. To get the blood pumping he chases after yellow spheres on the tennis court and enjoys searching for the occasional golf ball.
Mohammed Patel
Director
MBL | NHD Mech | GCC Factories
Mohammed Patel
Mohammed Patel is a Certificated Engineer (Factories) and holds a Master’s degree in Business Leadership. He is the Financial Director of the company and in addition, heads up the Operations and Legal departments.
Mohammed has extensive project management, engineering and management experience in the industry with a special knack for Industrial Facilities.
Beyond the office, Mohammed is a family man who enjoys reading and is always keen to saddle up a horse, preferably not whilst reading.
John Ferreira
Director
Pr Eng | B Eng Mech
John Ferreira
John Ferreira is a Non-Executive Director in SEM Solutions and the Managing Director of SEM’s founding- and strategic partner, Spoormaker & Partners. He is a Professionally registered Engineer with ECSA and has over 20 years of experience in the built environment.
John has an abundance of experience to share and when it comes to finding opportunities in difficulties, he likely already has a plan ready for implementation.
In his spare time John loves taking on sports and activities with his family and has a love for arts.
Menno Sulsters
Associate | Operations Manager Western Cape
CEMi | CMVPi | Diplom Ing Mech
Menno Sulsters
Menno Sulsters is the Operations Manager in the Western Cape and an Associate in the company. He studied Mechanical Engineering and graduated in the field of Energy, which was a dedicated sub division in the Netherlands at that time.
Menno has over 25 years of experience in the fields of energy efficiency (both electrical and mechanical), measurement and verification, Independent Commissioning Agent for Green Star accreditation, designs of energy-efficient solutions (mechanical and electrical), and water efficiency solutions and Solar PV systems.
Menno’s passions include travelling, music, hiking and entertaining with friends. He’s happily married and blessed to have his parents in good health back in the Netherlands.
Tiaan Hendriks
HOD: Design & Sales
M Eng Mech
(Renewable & Sustainable Energy)
Tiaan Hendriks
Tiaan Hendriks serves as the Head of the Design and Sales Departments of SEM Solutions. He holds a Master’s Degree in Mechanical Engineering (Renewable & Sustainable Energy) and is currently studying towards his Master’s Degree in Electrical Engineering (Smart Grid Technologies). With his interest deeply rooted in renewable energy, he has gained extensive knowledge and experience across the area of renewable energy generation and distribution with a strong focus that extends beyond the purely technical to include the economic, environmental and social aspects associated with it.
Tiaan takes great pride in working in the Renewable Energy sector. He enjoys the odd round of golf, braai with family and friends or taking a relaxing swim when the water isn’t too cold.
David Vermaak
National Sales Engineer
N Dip (Marketing Management) | N5 Eng (Mech)
David Vermaak
David Vermaak is our National Sales Engineer and plays a key role in our Marketing department. He holds a National Diploma in Marketing Management as well as an N5 Certificate in Mechanical Engineering. He is currently studying part-time towards a National Diploma in Mechanical Engineering.
David has 11 years of sales, design and project management experience in the built environment. Historically his main focus has been on HVAC and he has found a new passion in the renewable energy sector.
David is an outdoor enthusiast and enjoys bush adventures, hiking, mountain biking and exercising. As a part-time engineering student, he enjoys grappling and pondering the science beyond our atmosphere.
Jonandi Strydom
Professional Quantity Surveyor | Bid Manager
PQS | BSc Hons QS
Jonandi Strydom
Jonandi is a registered Professional Quantity Surveyor with the South African Council for the Quantity Surveying Profession (SACQSP). She is the master of the abacus and manages the company’s Bid Department.
Jonandi Strydom has extensive experience in cost management and contract administration of Projects in the Commercial, Residential, Industrial and Engineering sectors.
Whenever she runs out of things to count, she enjoys the outdoors, especially bird watching and keeping active.
Josh Landsberg
Design Engineer
B Eng Mech
Josh Landsberg
Josh Landsberg has a Bachelor’s degree in Mechanical Engineering from the University of Stellenbosch and is one of SEM’s Design Engineers in the Energy Department.
His experience spans from energy audits and energy efficiency optimization in the commercial sector to the design and commissioning of Solar PV projects for both commercial and residential applications.
Josh is passionate about renewable energy, improving our world and takes great pride in his work. He enjoys outdoor activities with family and friends and likes to escape to the beach whenever he gets the chance.
Ruan Jansen van Rensburg
Design Engineer | Project Manager
B Eng Mech | B Eng (Hons) ETM
Ruan Jansen van Rensburg
Ruan Jansen van Rensburg graduated in Mechanical Engineering from the University of Pretoria. He is both a Design Engineer and a Project Manager for the Waterside of the business
Ruan has sound engineering design & project management experience in the field of water and wet services installations prepared for residential, commercial, industrial and mixed-use developments
When Ruan is not running projects, he loves cycling, hiking and any other form of outdoorsy stuff he can locate in his vicinity.
Ashley Parks
Project Manager | Technician
Electrician | 3-Phase Wireman
Ashley Parks
Ashley Parks is a Qualified Electrician with a 3-phase wireman’s licence and an N4 in Electrical engineering. He is currently in completion phase of his master electrician licence.
Ashley has been in the industry for 20 years and has managed various projects in the energy/oil and gas industries. He has done Domestic, Commercial and Industrial electrical installations, electrical maintenance services on low to medium voltage installations, high voltage power generation switching and renewable energy solutions.
When the electrons stop flowing, Asley loves persuading golf balls to fly in the direction of his choosing, fine-tuning his aim around the table tennis table and enjoys fishing and camping. “In golf as in life, it is the follow-through that makes the difference.”
Koos Meyer
Project Manager | Technician
N Dip Mech
Koos Meyer
With more than 35 years of experience and a long-standing passion for efficient water utilization, it often feels like Koos Meyer’s well of knowledge will never run dry.
After obtaining his National Diploma in Mechanical Engineering in 1987, Koos has been involved in the renovation & upgrading of various sewage and effluent plants and upgrading water infrastructure & reticulation networks. Some of his expertise lies with bulk water storage tanks and booster pump installations and the maintenance of greywater systems.
If you can’t find Koos at the office or on-site and you can’t even get through to his cell phone, it is likely because he is camped out somewhere in the middle of nowhere with no form of civilisation as far as the eye can see.
Trevor Binner
Procurement Manager
Pr Tech Eng | M Dip Tech Elec | PV Green Card
Trevor Binner
Trevor Binner is a Professional Engineering Technologist and holds a Master’s Diploma in Technology. He is also a registered single-phase electrician and a registered PV Green Card installer.
Trevor literally has decades of experience in energy efficiency and solar PV projects which includes aspects of design, installation, and supervision of residential and commercial PV systems.
Mr Binner is an easy-going guy that simply gets along with everyone and loves music and the occasional billiards.
Willem Coetzee
HOD: Electrical Engineering
Pr Eng | B Eng Electrical & Electronic
Willem Coetzee
Willem Coetzee has 14 years of experience within the electrical and electronic consulting industry. Willem holds a Bachelors of Engineering degree and is a registered Professional Electrical Engineer with the Engineering Council of South Africa.
Throughout his consulting career, he was involved in a wide range of exciting commercial, industrial, education, healthcare, retail and data centre projects specializing in the full spectrum of electrical and electronic building services.
During his off time, Willem loves spending time in nature, searching for small white balls on the golf course and putting on some camo to surprise unsuspected animals with loud noises.
Corrie Prinsloo
Senior Professional Electrical Engineer
Pr Eng | B Eng Elec
Corrie Prinsloo
Corrie Prinsloo obtained his Bachelors in Electrical Engineering in 1998 and went on to register as a Professional Electrical Engineer with ECSA in 2002. With more than 20 years of professional engineering under the belt, Corrie has seen and solved many challenges in his career.
Corrie has extensive experience in the design, documentation, supervision and project management of electrical installations in all building sectors. His expertise ranges from Solar PV systems and Vertical Transportation, to Hospitals, Offices, Manufacturing Facilities, Universities, Mixed-use Developments and Data Centres.
On a personal note, Corrie prefers to spend his free time with his family, working on his short game on the golf course or patiently waiting for fish to take his bait next to the fishing waters.
Sorah Garber
Senior Professional Electrical Engineer
Pr Eng | B Eng Elec | BSc IT
Sorah Garber
Sorah Garber is an ECSA registered Professional Electrical Engineer. She has a Master degree in Electrical Engineering in addition to her BSc (IT) and an undergraduate degree in Electrical and Electronic engineering.
Sorah’s 13 years of engineering experience in the construction industry spans from the commercial and retail sectors to industrial facilities and installations.
When not at the office she loves spending time with her family and throwing around some weights as a South African Protea powerlifter.
Patrick Costello
Senior Professional Mechanical Engineer
Pr Eng | BSc Eng Mech
Patrick Costello
Patrick obtained his Mechanical Engineering degree from the University of Cape Town in 1987 and went on to obtain his Professional Engineering status in 1993. He has been practising as a mechanical consulting engineer in the built environment for over 35 years.
Most of his experience has been in the design and implementation of mechanical and electrical systems in the built environment ranging from large corporate office buildings to retail, hospitals, data centres, light industry and hospitality. One of Patrick’s specialities has been the design and rollout of energy efficiency and renewable technologies.
Patrick’s personal interests are working in electronics, wood and steel and he enjoys tracking the latest technological breakthroughs.
Jack La Grange
Senior Professional Mechanical Engineer
Pr Eng | B Eng Mech
Jack La Grange
Jack is a specialist Professional Wet Services and Fire Engineer with a passion for sustainability. He has vast experience in the built environment industry and his project experience covers commercial buildings, industrial facilities, retail centres, residential developments and medical/healthcare facilities.
Jack is so passionate about water that he get’s up before sunrise every morning to walk on the water, i.e. get his feet wet on his surfboard.
Markus Konnel
QA Manager | O&M Manager
Electrician
Markus Konnel
Markus Konnel is a qualified electrician and heads up the quality assurance of our installations as well as managing the O&M phase of our projects.
With close to 30 years of experience, Markus is extremely knowledgeable and has vast experience the industry. His competency ranges from electrical testing, electrical installations, electrical repairs and photovoltaic installations, to energy audits and maintenance of air conditioning equipment and heat pumps.
Lorna Rensburg
Financial & HR Administrator
HR Professional | N Dip HRM
Lorna Rensburg
Lorna Rensburg is responsible for our office administration, public relations and human resources management. She has a National Diploma in Human Resources coupled with a certificate in Business Computers and has a sound financial and business background.
Lorna has a wicked sense of humour, a warm personality and is a wholesome human who loves family, friends and felines. She mostly enjoys movement and energy in the form of dancing, running, adventure hiking, body conditioning, swimming or even just walking in a mall or beach.
Surina Du Toit
Accountant
B Com | HDip Tax | SAIPA
Surina Du Toit
Surina du Toit manages the accounting side of the business and has been in employment in the fields of Accounting and Tax related positions for almost 20 years. She holds a B.Com degree and a Higher Diploma in Tax.
Surina enjoys spending time with her family over weekends and loves to paint as a hobby.
Our CREDENTIALS
GRADINGS
- BBBEE Level 2 Contributor
- Eskom Registered Energy Services Company (ESCo)
- CIDB gradings of 6EB, 6ME, 6CE, 6SO, 7EP
- Registered Electrical Contractor with the Dept of Labour (DOL)
- Registered on the National Treasury Central Supplier Database (CSD)
- Accredited by FNB Commercial, Sustainable Asset Finance
CERTIFICATIONS
- Pr Engineers registered with ECSA
- SAPVIA PV Green Card Accredited Installer
- Certified Energy Managers (CEM)
- Certified Project Management Professionals (CPMP)
- Certified Measurement & Verification Professionals (CMVP)
- Licenced 3-phase wireman
MEMBERSHIPS
- Green Building Council of South Africa Member (GBCSA)
- South African Photovoltaic Industry Association Member (SAPVIA)
- Institute of Plumbing South Africa Member (IOPSA)
Our PARTNERS
Spoormaker & Partners
Spoormaker & Partners have been providing professional consulting engineering services to the construction and building services industries since 1964. Their vision is to be recognised as the preferred consulting practice by clients to provide innovative HVAC, Electrical, Fire and Wet services designs and sustainable solutions at the lowest life cycle cost, the highest quality and within the agreed budget and time frame. Their mission is to provide their services in a professional way to the satisfaction of their customers while providing a stimulating and stable work environment for their staff.
SEM partners with Spoormaker as and when required on Mechanical and Electrical Engineering Designs and Draughting Services.
Plancom Services
Plancom was established in Centurion in 1985 initially to provide large format plan printing and copy services to professional firms and the public. Since then, Plancom has expanded its service offering to a wide range of industries such as architecture, construction, industrial and retail.
Plancom delivers a wide range of expert large format plan printing and blueprint scanning services to SEM and our clients.
Aeversa
AEVERSA is a service provider to commercial electric fleets and Charge Station Owners (CSO’s). Their aim is to provide quality guaranteed products to the industry. With AEVERSA as a strategic partner, SEM can offer fleet conversion projections with viable forecasting which aims to ease the decision-making process.
Our packed solution includes infrastructure assessments, charging stations- and electrical fleet rollout together with fleet management services. For greater ROI’s we also offer the fully wrapped design, supply and installation of solar PV systems coupled with cost effective and purpose-built energy storage solutions where needed.